FCM V1 API Migration initial commit. (#8087)

Add FCM V1 registration API support and deprecate legacy registration
api(s) like getToken, onNewToken etc.

- Added v1 registration support
- Deprecated legacy registration apis
- Deprecated multi project support for FCM
- Added/updated tests for the same.

Author: eldhosembabu

firebase-messaging/CHANGELOG.md

@@ -1,5 +1,8 @@
 # Unreleased
 
+- [feature] Added support for FCM registration using Firebase Installation ID (#8087)
+- [deprecated] Existing getToken, deleteToken, onNewToken api(s) are deprecated (#8087)
+
 # 25.0.2
 
 - [changed] Fix ANR in SharedPreferencesQueue by reducing lock contention

firebase-messaging/api.txt

@@ -2,17 +2,19 @@
 package com.google.firebase.messaging {
 
   public class FirebaseMessaging {
-    method public com.google.android.gms.tasks.Task<java.lang.Void!> deleteToken();
+    method @Deprecated public com.google.android.gms.tasks.Task<java.lang.Void!> deleteToken();
     method public boolean deliveryMetricsExportToBigQueryEnabled();
     method public static com.google.firebase.messaging.FirebaseMessaging getInstance();
-    method public com.google.android.gms.tasks.Task<java.lang.String!> getToken();
+    method @Deprecated public com.google.android.gms.tasks.Task<java.lang.String!> getToken();
     method public boolean isAutoInitEnabled();
     method public boolean isNotificationDelegationEnabled();
+    method public com.google.android.gms.tasks.Task<java.lang.Void!> register();
     method @Deprecated public void send(com.google.firebase.messaging.RemoteMessage);
     method public void setAutoInitEnabled(boolean);
     method public void setDeliveryMetricsExportToBigQuery(boolean);
     method public com.google.android.gms.tasks.Task<java.lang.Void!> setNotificationDelegationEnabled(boolean);
     method public com.google.android.gms.tasks.Task<java.lang.Void!> subscribeToTopic(String);
+    method public com.google.android.gms.tasks.Task<java.lang.Void!> unregister();
     method public com.google.android.gms.tasks.Task<java.lang.Void!> unsubscribeFromTopic(String);
     field @Deprecated public static final String INSTANCE_ID_SCOPE = "FCM";
   }
@@ -23,9 +25,11 @@ package com.google.firebase.messaging {
     method @WorkerThread public void onDeletedMessages();
     method @WorkerThread public void onMessageReceived(com.google.firebase.messaging.RemoteMessage);
     method @Deprecated @WorkerThread public void onMessageSent(String);
-    method @WorkerThread public void onNewToken(String);
+    method @Deprecated @WorkerThread public void onNewToken(String);
+    method @WorkerThread public void onRegistered(String);
     method @Deprecated @WorkerThread public void onSendError(String, Exception);
     method public final int onStartCommand(android.content.Intent!, int, int);
+    method @WorkerThread public void onUnregistered(String);
   }
 
   public final class MessagingKt {
@@ -42,7 +46,7 @@ package com.google.firebase.messaging {
     method public com.google.firebase.messaging.RemoteMessage.Notification? getNotification();
     method @com.google.firebase.messaging.RemoteMessage.MessagePriority public int getOriginalPriority();
     method @com.google.firebase.messaging.RemoteMessage.MessagePriority public int getPriority();
-    method public String? getSenderId();
+    method @Deprecated public String? getSenderId();
     method public long getSentTime();
     method @Deprecated public String? getTo();
     method public int getTtl();

firebase-messaging/firebase-messaging.gradle.kts

@@ -102,7 +102,7 @@ dependencies {
   api("com.google.firebase:firebase-encoders-json:18.0.0")
   api("com.google.firebase:firebase-encoders-proto:16.0.0")
   api("com.google.firebase:firebase-iid-interop:17.1.0")
-  api("com.google.firebase:firebase-installations:18.0.0") {
+  api("com.google.firebase:firebase-installations:19.1.0") {
     exclude(group = "com.google.firebase", module = "firebase-common-ktx")
   }
   api("com.google.firebase:firebase-installations-interop:17.1.0")