Add some additional FCM logging.

src/org/thoughtcrime/securesms/gcm/FcmService.java

@@ -50,6 +50,8 @@ public class FcmService extends FirebaseMessagingService implements InjectableTy
 
   @Override
   public void onNewToken(String token) {
+    Log.i(TAG, "onNewToken()");
+
     if (!TextSecurePreferences.isPushRegistered(getApplicationContext())) {
       Log.i(TAG, "Got a new FCM token, but the user isn't registered.");
       return;

src/org/thoughtcrime/securesms/jobs/FcmRefreshJob.java

@@ -91,6 +91,10 @@ public class FcmRefreshJob extends ContextJob implements InjectableType {
       Optional<String> token = FcmUtil.getToken();
 
       if (token.isPresent()) {
+        if (!token.get().equals(TextSecurePreferences.getFcmToken(context))) {
+          Log.i(TAG, "New token differs from the old token.");
+        }
+
         textSecureAccountManager.setGcmId(token);
         TextSecurePreferences.setFcmToken(context, token.get());
         TextSecurePreferences.setFcmTokenLastSetTime(context, System.currentTimeMillis());