Fixes commons-app#3382 Fixed Notification Message Icon Background (commons-app#3383)

Author: madhurgupta10

app/src/main/res/layout/item_notification.xml

@@ -14,7 +14,6 @@
         android:layout_marginLeft="16dp"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
-        android:background="@android:color/white"
         android:scaleType="centerCrop"
         app:srcCompat="@drawable/ic_message_black_24dp"
         app:tint="@color/primaryDarkColor"