set theming color for notification

src/gplay/java/com/owncloud/android/services/firebase/NCFirebaseMessagingService.java

@@ -25,7 +25,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.BitmapFactory;
 import android.media.RingtoneManager;
-import android.net.Uri;
 import android.support.v4.app.NotificationCompat;
 
 import com.google.firebase.messaging.FirebaseMessagingService;
@@ -33,6 +32,7 @@ import com.google.firebase.messaging.RemoteMessage;
 import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.ui.activity.NotificationsActivity;
+import com.owncloud.android.utils.ThemeUtils;
 
 public class NCFirebaseMessagingService extends FirebaseMessagingService {
     private static final String TAG = "NCFirebaseMessaging";
@@ -53,6 +53,7 @@ public class NCFirebaseMessagingService extends FirebaseMessagingService {
         NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                 .setSmallIcon(R.drawable.notification_icon)
                 .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.notification_icon))
+                .setColor(ThemeUtils.primaryColor())
                 .setContentTitle(contentTitle)
                 .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                 .setAutoCancel(true)