Add permission meta-state flags to support grant/revoke permission policy.

We now maintain a mata-state with each permission in the form of flags
specyfying the policy for this permission. This enables support of the
following use cases:

1. The user denies a permission with prejudice in which case an app cannot
   request the permission at runtime. If an app requests such a permssion
   it gets a denial unless the user grants the permission from settings.

2. A legacy app with disabled app-ops being upgraded to support runtime
   permissions. The disabled app ops are converted to permission revocations.
   The app ops manager is a part of the activity manger which sits on top
   of the package manager, hence the latter cannot have a dependency on the
   former. To avoid this the package installer which is the global
   permission managment authority marks the permission as revoked on
   upgrade and the package manager revokes it on upgrade.

3. A device policy fixing a permission in a granted or revoked state. This
   additional information is folded in the meta-state flags and neither
   apps can request such permissions if revoked not the user can change
   the permission state in the UI.

Change-Id: I443e8a7bb94bfcb4ff6003d158e1408c26149811

0 files changed, 0 insertions, 0 deletions