Update android manifests to set exported:true on main activities in...

Update android manifests to set exported:true on main activities in integration test for api 33 support (#127892)

Update android manifests to set exported:true on main activities in integration test for api 33 support

#127689 
#127884 is resolved by https://flutter-review.googlesource.com/c/recipes/+/45181 but this pr is required to reland.

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

@@ -14,6 +14,7 @@ found in the LICENSE file. -->
         android:label="abstract_method_smoke_test">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

dev/integration_tests/android_embedding_v2_smoke_test/android/app/src/main/AndroidManifest.xml

@@ -14,6 +14,7 @@ found in the LICENSE file. -->
         android:label="android_embedding_v2_smoke_test">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

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

@@ -18,6 +18,7 @@ found in the LICENSE file. -->
          Application and put your custom class here. -->
     <application android:name="${applicationName}" android:label="Platform Interaction" android:icon="@mipmap/ic_launcher">
         <activity android:name="com.yourcompany.platforminteraction.MainActivity"
+                  android:exported="true"
                   android:launchMode="singleTop"
                   android:theme="@android:style/Theme.Black.NoTitleBar"
                   android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"

dev/integration_tests/gradle_deprecated_settings/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"

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

@@ -15,6 +15,7 @@ found in the LICENSE file. -->
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/NormalTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

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

@@ -17,6 +17,7 @@ found in the LICENSE file. -->
         <activity
             android:name=".MainActivity"
             android:launchMode="singleTop"
+            android:exported="true"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"