PlaybackControlView improvements

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=132981908

library/src/main/res/layout/playback_control_view.xml

@@ -36,9 +36,8 @@
       android:contentDescription="@string/rew_description"
       style="@style/MediaButton.Rew"/>
 
-    <ImageButton android:id="@+id/pause"
-      android:contentDescription="@string/pause_description"
-      style="@style/MediaButton.Pause"/>
+    <ImageButton android:id="@+id/play"
+      style="@style/MediaButton"/>
 
     <ImageButton android:id="@+id/ffwd"
       android:contentDescription="@string/ffw_description"

library/src/main/res/values/styles.xml

@@ -31,11 +31,6 @@
     <item name="android:contentDescription">@string/next_description</item>
   </style>
 
-  <style name="MediaButton.Play">
-    <item name="android:src">@drawable/ic_media_play</item>
-    <item name="android:contentDescription">@string/play_description</item>
-  </style>
-
   <style name="MediaButton.Ffwd">
     <item name="android:src">@drawable/ic_media_ff</item>
     <item name="android:contentDescription">@string/ffw_description</item>
@@ -46,10 +41,5 @@
     <item name="android:contentDescription">@string/rew_description</item>
   </style>
 
-  <style name="MediaButton.Pause">
-    <item name="android:src">@drawable/ic_media_pause</item>
-    <item name="android:contentDescription">@string/pause_description</item>
-  </style>
-
 </resources>