Add proper styling for action bar.

Since we want the spinner behind the text and the number next to it,
but we dont want a total custom view, we need to override the styles.

Change-Id: I28bfdc899336b25e7ab94b5b42d1fd3dfc1428f3
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index fdbbd05..0259a28 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -32,7 +32,7 @@
     <application
         android:icon="@mipmap/ic_launcher_mail"
         android:label="@string/app_name"
-        android:theme="@android:style/Theme.Holo.Light" >
+        android:theme="@style/UnifiedEmailTheme" >
         <!-- TODO: add a permission on this -->
         <activity
             android:label="@string/app_name"