Fix bug #12890909 Settings crashes when tapped on Add Account option in settings

Follow up from the previous CL that was trying to fix it.

- remove the dialog theme android:theme="@android:style/Theme.Holo.Dialog" as
a Dialog does not support a Drawwer

Change-Id: I8b3fe89c157f0b454464c04a4acd4f32049bde71

AndroidManifest.xml

@@ -1514,8 +1514,7 @@
         </activity>
 
         <activity android:name=".accounts.SyncSettingsActivity"
-            android:label="@string/account_sync_settings_title"
-            android:theme="@android:style/Theme.Holo.Dialog">
+            android:label="@string/account_sync_settings_title">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <action android:name="android.settings.SYNC_SETTINGS" />