Hide storage permission usages.

Storage usages do not work correctly due to the recent storage
changes.  We can thus hide it from UI screens that access usage
information.

Fixes: 130567526
Test: View Permissions Hub.
Test: View relevant AppPermissionFragment, PermissionAppsFragment, and
AppPermissionsFragment screens.

Change-Id: I46a293cdf963b50a2a7e2ef222b9529c5d8062ac