Convert hardcoded colors to be changed when Theme changes

Author: kunall17

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

@@ -4,6 +4,7 @@
     android:id="@+id/messageTile"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:background="@color/stream_background"
     android:paddingEnd="8dp"
     android:paddingRight="8dp">