Make C2DM_SEND permission a signature permission

    <permission

        android:name="com.google.android.c2dm.permission.SEND"

        android:label="@string/perm_c2dm_send_label"

        android:protectionLevel="dangerous"/>

        android:protectionLevel="signature"/>

    <permission-tree

        android:name="com.google.android.googleapps.permission.GOOGLE_AUTH"