Change the way to achieve token while init the app (#667)

* Fix the logic to generate .pro file

* update readme file

* modify the release notes

* Change the way to fetch initial token with the new API

* Change the way to fetch initial token with the new API

* Add change to release notes

Co-authored-by: Cynthia Jiang <[email protected]>

Author: cynthiajoan

messaging/integration_test/src/integration_test.cc

@@ -354,6 +354,8 @@ TEST_F(FirebaseMessagingTest, TestReceiveToken) {
 
   EXPECT_TRUE(RequestPermission());
 
+  EXPECT_TRUE(::firebase::messaging::IsTokenRegistrationOnInitEnabled());
+
   FLAKY_TEST_SECTION_BEGIN();
 
   EXPECT_TRUE(WaitForToken());

messaging/src/android/cpp/messaging.cc

@@ -713,21 +713,13 @@ void Terminate() {
 static void InstallationsGetToken() {
   FIREBASE_ASSERT_MESSAGE_RETURN_VOID(internal::IsInitialized(),
                                       kMessagingNotInitializedError);
-  JNIEnv* env = g_app->GetJNIEnv();
-
-  // Intent intent = new Intent(this, RegistrationIntentService.class);
-  jobject new_intent = env->NewObject(
-      util::intent::GetClass(),
-      util::intent::GetMethodId(util::intent::kConstructor), g_app->activity(),
-      registration_intent_service::GetClass());
+  Future<std::string> result = GetToken();
 
-  // startService(intent);
-  jobject component_name = env->CallObjectMethod(
-      g_app->activity(),
-      util::context::GetMethodId(util::context::kStartService), new_intent);
-  assert(env->ExceptionCheck() == false);
-  env->DeleteLocalRef(component_name);
-  env->DeleteLocalRef(new_intent);
+  result.OnCompletion(
+      [](const Future<std::string>& result, void* voidptr) {
+        NotifyListenerOnTokenReceived(result.result()->c_str());
+      },
+      nullptr);
 }
 
 static void SubscriptionUpdateComplete(JNIEnv* env, jobject result,

release_build_files/readme.md

@@ -567,10 +567,16 @@ code.
 
 ## Release Notes
 
+### Future Release
+-   Changes
+    -   Messaging (Android): Fixes an issue to receive token when
+        initialize the app. 
+        ([#667](https://github.com/firebase/firebase-cpp-sdk/pull/667)).
+        
 ### 8.5.0
 -   Changes
     -   General: Updating Android and iOS dependencies to the latest.
-    -   General: Fix the generating of proguard file 
+    -   General: Fixes an issue with generating Proguard files. 
         ([#664](https://github.com/firebase/firebase-cpp-sdk/pull/664)).
 
 ### 8.4.0