[Android] Add explicit exported tag to Linux_android flavors test (#117542)

* Add exported tag

* Undo testing changes

Author: camsim99

dev/integration_tests/flavors/android/app/src/main/AndroidManifest.xml

@@ -12,6 +12,7 @@ found in the LICENSE file. -->
         android:label="flavors">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"