Remove overdraw

The background is already defined by the root element.

Signed-off-by: Tim Krüger <t@timkrueger.me>

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

@@ -24,8 +24,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/lobby_view"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:background="@color/bg_default">
+    android:layout_height="match_parent">
 
     <ImageView
         android:id="@+id/lobby_image_view"