REVERT EVEN MOAR APPOPS
AppOps: track op persistence by name instead of id

On XML write, include the op name.  On XML read, map
the name back to op id (if it exists).

Persistent AppOp state now follows the op name instead
numeric id.  This allows upgrades between versions of
android that have different code<>name mappings.

Change-Id: Iffc02095b6838a34ff999f8db51c2c6739dd0db8 (reverted from commit 77c4a66e19c0de10bf3de2b2f57f900876bd01b8)