Bug 1213223 - Remove android prefix from accentColor. r=sebastian

--HG--
extra : commitid : 9Ure3mKBZE2
extra : rebase_source : ab195ef08257a72c33842670297967cd27277a56

mobile/android/base/resources/values-v21/themes.xml

@@ -15,7 +15,7 @@
         <item name="android:windowContentOverlay">@null</item>
         <item name="android:actionBarStyle">@style/GeckoActionBar</item>
         <item name="android:actionBarTheme">@style/ActionBarTheme</item>
-        <item name="android:colorAccent">@color/action_orange</item>
+        <item name="colorAccent">@color/action_orange</item>
     </style>
 
     <style name="GeckoPreferencesBase" parent="GeckoBase">