Filter out app starts with more than 60s

sentry-android-core/src/main/java/io/sentry/android/core/AppStartState.java

@@ -13,7 +13,7 @@ public final class AppStartState {
 
   private static @NotNull AppStartState instance = new AppStartState();
 
-  /** // We filter out App starts more than 60s */
+  /** We filter out App starts more than 60s */
   private static final int MAX_APP_START_MILLIS = 60000;
 
   private @Nullable Long appStartMillis;
@@ -53,9 +53,14 @@ public synchronized Long getAppStartInterval() {
     }
     final long appStart = appStartEndMillis - appStartMillis;
 
-    // we filter out app start more than 60s.
-    // this could be due to many different reasons.
-    // we've seen app starts with hours, days and even months.
+    // We filter out app start more than 60s.
+    // This could be due to many different reasons.
+    // If you do the manual init and init the SDK too late and it does not compute the app start end
+    // in the very first Activity.
+    // If the process starts but the App isn't in the foreground.
+    // If the system fork the the zygote earlier to accelerate the app start.
+    // And some unknown reasons that could not be reproduced.
+    // We've seen app starts with hours, days and even months.
     if (appStart >= MAX_APP_START_MILLIS) {
       return null;
     }