MediaRouter: Reduce the size of the mediarouter library

In order to reduce the size,
- Used optimized png files
- Removed some resources in mdpi/hdpi dimensions
- Used tinting instead of light-theme resources

Bug: 28901991
Change-Id: I15f1798eb41be02e07b322a5db0fa7cb37d8bec5

diff --git a/v7/mediarouter/res/values/themes.xml b/v7/mediarouter/res/values/themes.xml
index cf1c303..2d1955a 100644
--- a/v7/mediarouter/res/values/themes.xml
+++ b/v7/mediarouter/res/values/themes.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2013 The Android Open Source Project
+<!-- Copyright (C) 2016 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -22,8 +22,8 @@
 
         <item name="MediaRouteControllerWindowBackground">@drawable/mr_dialog_material_background_dark</item>
         <item name="mediaRouteOffDrawable">@drawable/ic_media_route_off_mono_dark</item>
-        <item name="mediaRouteConnectingDrawable">@drawable/mr_ic_media_route_connecting_mono_dark</item>
-        <item name="mediaRouteOnDrawable">@drawable/mr_ic_media_route_on_mono_dark</item>
+        <item name="mediaRouteConnectingDrawable">@drawable/mr_ic_media_route_connecting</item>
+        <item name="mediaRouteOnDrawable">@drawable/mr_ic_media_route_on</item>
         <item name="mediaRouteCloseDrawable">@drawable/mr_ic_close_dark</item>
         <item name="mediaRoutePlayDrawable">@drawable/mr_ic_play_dark</item>
         <item name="mediaRoutePauseDrawable">@drawable/mr_ic_pause_dark</item>
@@ -54,8 +54,6 @@
 
         <item name="MediaRouteControllerWindowBackground">@drawable/mr_dialog_material_background_light</item>
         <item name="mediaRouteOffDrawable">@drawable/ic_cast_off_light</item>
-        <item name="mediaRouteConnectingDrawable">@drawable/mr_ic_media_route_connecting_mono_light</item>
-        <item name="mediaRouteOnDrawable">@drawable/mr_ic_media_route_on_mono_light</item>
         <item name="mediaRouteCloseDrawable">@drawable/mr_ic_close_light</item>
         <item name="mediaRoutePlayDrawable">@drawable/mr_ic_play_light</item>
         <item name="mediaRoutePauseDrawable">@drawable/mr_ic_pause_light</item>