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-common.txt

@@ -15,7 +15,7 @@ etc/default-permissions/default-permissions.xml
 
 etc/permissions/com.google.android.maps.xml
 etc/permissions/com.google.android.dialer.support.xml
-etc/permissions/privapp-permissions-google.xml|2e4c21fc0162907187da9b1cc640699d3a93c565
+etc/permissions/privapp-permissions-google.xml|8295b2743b05191eeb7b1992c02a7a59aba338dd
 
 etc/sysconfig/google-hiddenapi-package-whitelist.xml
 etc/sysconfig/google.xml