build(deps): bump gradle in /flutter_secure_storage/android

Bumps gradle from 7.2.1 to 7.2.2.

---
updated-dependencies:
- dependency-name: com.android.tools.build:gradle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

flutter_secure_storage/android/build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
+        classpath 'com.android.tools.build:gradle:7.2.2'
     }
 }