Glimpse: ViewActivity: Fix bottom bar background

Change-Id: I5f0468e34e184b1ebe0ee8b48a5f1b5943649c40
diff --git a/app/src/main/res/layout/activity_view.xml b/app/src/main/res/layout/activity_view.xml
index eacd8a9..f9ee1ac 100644
--- a/app/src/main/res/layout/activity_view.xml
+++ b/app/src/main/res/layout/activity_view.xml
@@ -62,9 +62,10 @@
 
     <HorizontalScrollView
         android:id="@+id/bottomSheetHorizontalScrollView"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:background="@drawable/bg_media_viewer_bottom_sheet"
+        android:fillViewport="true"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent">