[core] fix androidTest build issues (#19469)

# Why

a couple of issues i find when investigating the jsc problem in #19411

# How

- from #19372 and #19447, i noticed the androidTest running from bare-expo is crashing. the crash is libc++_shared.so not found. when i try to use `pickFirsts` to fix that, there's another `__emutls_get_address` symbol not found crashing issue. that happens because i build ReactAndroid by ndk r24, but expo-modules-core by ndk r21 (the default side-by-side ndk version in the current AGP). so the first addressing issue is to align the ndk version with the root project.
- support hermes building on react-native 0.70 without building from source. close ENG-6598
- use static c++ runtime for androidTest
  - this is the most complicated stuff. when running `et android-native-unit-tests -t instrumented`, it executes multiple androidTest commands together, e.g. `./gradlew :expo-modules-core:connectedAndroidTest :expo-eas-client:connectedAndroidTest`. if we use `pickFirsts` strategy, it will have multiple libc++_shared.so error when building expo-eas-client androidTest, one from e-m-c, and the other from ReactAndroid. so maybe the easy solution is to have static c++ runtime for androidTest.

# Test Plan

after these changes, the androidTest will fail both on jsc and hermes. to test everything works, i have to comment out other broken tests: `JSIFunctionTest.coded_error_should_be_converted` and `JSIFunctionTest.arbitrary_error_should_be_converted`

- ✅ [bare-expo] `./gradlew :expo-modules-core:connectedAndroidTest :expo-eas-client:connectedAndroidTest`
- ✅ [bare-expo] `./gradlew :expo-modules-core:connectedAndroidTest`
- ✅ [bare-expo] `./gradlew :expo-eas-client:connectedAndroidTest`
- ✅ [android expo go] `./gradlew :expo-modules-core:connectedAndroidTest :expo-eas-client:connectedAndroidTest`
- ✅ [android expo go] `./gradlew :expo-modules-core:connectedAndroidTest`
- ✅ [android expo go] `./gradlew :expo-eas-client:connectedAndroidTest`

packages/expo-av/android/build.gradle

@@ -74,6 +74,13 @@ afterEvaluate {
 android {
   compileSdkVersion safeExtGet("compileSdkVersion", 31)
 
+  if (rootProject.hasProperty("ndkPath")) {
+    ndkPath rootProject.ext.ndkPath
+  }
+  if (rootProject.hasProperty("ndkVersion")) {
+    ndkVersion rootProject.ext.ndkVersion
+  }
+
   compileOptions {
     sourceCompatibility JavaVersion.VERSION_11
     targetCompatibility JavaVersion.VERSION_11

packages/expo-gl/android/build.gradle

@@ -74,6 +74,13 @@ afterEvaluate {
 android {
   compileSdkVersion safeExtGet("compileSdkVersion", 31)
 
+  if (rootProject.hasProperty("ndkPath")) {
+    ndkPath rootProject.ext.ndkPath
+  }
+  if (rootProject.hasProperty("ndkVersion")) {
+    ndkVersion rootProject.ext.ndkVersion
+  }
+
   compileOptions {
     sourceCompatibility JavaVersion.VERSION_11
     targetCompatibility JavaVersion.VERSION_11

packages/expo-modules-core/android/CMakeLists.txt

@@ -85,7 +85,7 @@ if(${UNIT_TEST})
         PATHS ${HERMES_SO_DIR}
         NO_CMAKE_FIND_ROOT_PATH
     )
-    set(JSEXECUTOR_INCLUDE "${HERMES_HEADER_DIR}")
+    set(JSEXECUTOR_INCLUDE ${HERMES_HEADER_DIR} ${HERMES_HEADER_DIR}/API ${HERMES_HEADER_DIR}/public)
   else()
     find_library(
         JSEXECUTOR_LIB

packages/expo-modules-core/android/build.gradle

@@ -83,7 +83,12 @@ def currentHermesVersion = file("${REACT_NATIVE_DIR}/sdks/.hermesversion").exist
 def hasHermesProject = findProject(":ReactAndroid:hermes-engine") != null
 def prebuiltHermesCacheHit = hasHermesProject && currentHermesVersion == prebuiltHermesVersion
 
+// By default we are going to download and unzip hermes inside the /sdks/hermes folder
+// but you can provide an override for where the hermes source code is located.
+def hermesDir = System.getenv("REACT_NATIVE_OVERRIDE_HERMES_DIR") ?: file("${REACT_NATIVE_DIR}/sdks/hermes")
+
 def USE_HERMES = false
+def NEED_DOWNLOAD_HERMES = false
 def HERMES_HEADER_DIR = null
 def HERMES_AAR = null
 if (findProject(":app")) {
@@ -108,19 +113,14 @@ if (USE_HERMES) {
     HERMES_HEADER_DIR = file("${thirdPartyNdkDir}/hermes/prefab/modules/libhermes/include")
     HERMES_AAR = file("${REACT_NATIVE_DIR}/ReactAndroid/hermes-engine/build/outputs/aar/hermes-engine-debug.aar")
   } else {
-    // The `hermes-engine` package doesn't contain the correct version of the Hermes.
-    // The AAR we need to import is located in the React Native package.
-    // However, the version from RN doesn't include header files.
-    // To get those, we must fall back to the `hermes-engine` package.
-    def hermesEngineDir = new File(["node", "--print", "require.resolve('hermes-engine/package.json')"].execute(null, rootDir).text.trim()).parent
-
     def prebuiltAAR = fileTree(REACT_NATIVE_DIR).matching { include "**/hermes-engine/**/hermes-engine-*-debug.aar" }
     if (prebuiltAAR.any()) {
       HERMES_AAR = prebuiltAAR.singleFile
     } else {
       HERMES_AAR = file("${hermesEngineDir}/android/hermes-debug.aar")
     }
-    HERMES_HEADER_DIR = file("${hermesEngineDir}/android/include")
+    HERMES_HEADER_DIR = file("${hermesDir}")
+    NEED_DOWNLOAD_HERMES = true
   }
 }
 // END HERMES
@@ -154,6 +154,13 @@ afterEvaluate {
 android {
   compileSdkVersion safeExtGet("compileSdkVersion", 31)
 
+  if (rootProject.hasProperty("ndkPath")) {
+    ndkPath rootProject.ext.ndkPath
+  }
+  if (rootProject.hasProperty("ndkVersion")) {
+    ndkVersion rootProject.ext.ndkVersion
+  }
+
   compileOptions {
     sourceCompatibility JavaVersion.VERSION_11
     targetCompatibility JavaVersion.VERSION_11
@@ -176,7 +183,7 @@ android {
     externalNativeBuild {
       cmake {
         abiFilters (*reactNativeArchitectures())
-        arguments "-DANDROID_STL=c++_shared",
+        arguments "-DANDROID_STL=${isExpoModulesCoreTests ? 'c++_static' : 'c++_shared'}",
           "-DREACT_NATIVE_DIR=${REACT_NATIVE_DIR}",
           "-DREACT_NATIVE_SO_DIR=${REACT_NATIVE_SO_DIR}",
           "-DREACT_NATIVE_TARGET_VERSION=${REACT_NATIVE_TARGET_VERSION}",
@@ -206,6 +213,7 @@ android {
     // Gradle will add cmake target dependencies into packaging.
     // Theses files are intermediated linking files to build modules-core and should not be in final package.
     def sharedLibraries = [
+      "**/libc++_shared.so",
       "**/libfabricjni.so",
       "**/libfbjni.so",
       "**/libfolly_json.so",
@@ -234,7 +242,6 @@ android {
     } else {
       excludes += sharedLibraries
     }
-    excludes.add("**/libc++_shared.so")
   }
 
   configurations {
@@ -457,12 +464,36 @@ task prepareFolly(dependsOn: [downloadFolly], type: Copy) {
   includeEmptyDirs = false
   into("$thirdPartyNdkDir/folly")
 }
-// END FOLLy
+// END FOLLY
+
+task downloadHermes(type: Download) {
+  def hermesVersion = currentHermesVersion ?: "main"
+  src("https://github.com/facebook/hermes/tarball/${hermesVersion}")
+  onlyIfNewer(true)
+  overwrite(false)
+  dest(new File(downloadsDir, "hermes-${hermesVersion}.tar.gz"))
+}
+
+task unzipHermes(dependsOn: downloadHermes, type: Copy) {
+  from(tarTree(downloadHermes.dest)) {
+    eachFile { file ->
+      // We flatten the unzip as the tarball contains a `facebook-hermes-<SHA>`
+      // folder at the top level.
+      if (file.relativePath.segments.size() > 1) {
+        file.relativePath = new org.gradle.api.file.RelativePath(!file.isDirectory(), file.relativePath.segments.drop(1))
+      }
+    }
+  }
+  into(hermesDir)
+}
 
 task prepareHermes(dependsOn: createNativeDepsDirectories) {
   if (!USE_HERMES) {
     return
   }
+  if (NEED_DOWNLOAD_HERMES) {
+    dependsOn(unzipHermes)
+  }
 
   doLast {
     def files = zipTree(HERMES_AAR).matching({ it.include "**/*.so", "prefab/modules/libhermes/include/**/*" })