Update all Velvet.apk to same version 8.91.5.21

This is too ensure a uniform experience across all arch's and to
have same required privapp permissions.
Also added a privapp permission to the whitelist xml that's required
by this new version.

Change-Id: I04abc73565bb02c5d4ad60c5331cabc672fda147

common/proprietary/etc/permissions/privapp-permissions-google.xml

@@ -283,6 +283,7 @@ It allows additional grants on top of privapp-permissions-platform.xml
         <permission name="android.permission.INTERACT_ACROSS_USERS"/>
         <permission name="android.permission.MANAGE_VOICE_KEYPHRASES"/>
         <permission name="android.permission.MEDIA_CONTENT_CONTROL"/>
+        <permission name="android.permission.PACKAGE_USAGE_STATS"/>
         <permission name="android.permission.REAL_GET_TASKS"/>
         <permission name="android.permission.SET_MEDIA_KEY_LISTENER"/>
         <permission name="android.permission.SET_VOLUME_KEY_LONG_PRESS_LISTENER"/>