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

proprietary-files-arm-nongrouper.txt

@@ -1 +1 @@
--priv-app/Velvet/Velvet.apk;PRESIGNED|6ff0bf464004006754cd333c9d45f471c09b13ce
+-priv-app/Velvet/Velvet.apk;PRESIGNED|1bd57d7a32d77ec007ca7ad8032cca8d9038c555