-Modified selected play queue item to highlight entire item instead of text.

-Added selected item bullet.
-Modified play queue panel darker on main video player.
-Fixed color issue on play queue panel on light-themed main video player.
-Fixed hold-to-enqueue tooltip flashing when clicked on earlier sdk versions.
-Fixed queue item removal causing metadata for currently playing to refresh.

app/src/main/res/values/attrs.xml

@@ -19,11 +19,13 @@
     <attr name="language" format="reference"/>
     <attr name="history" format="reference"/>
     <attr name="drag_handle" format="reference"/>
+    <attr name="selected" format="reference"/>
 
     <!-- Can't refer to colors directly into drawable's xml-->
     <attr name="toolbar_shadow_drawable" format="reference"/>
+    <attr name="selector_drawable" format="reference"/>
 
-    <attr name="selector_color" format="color"/>
     <attr name="separator_color" format="color"/>
+    <attr name="queue_background_color" format="color"/>
     <attr name="contrast_background_color" format="color"/>
 </resources>