DO NOT MERGE: Add separate information about user whitelist.

Use this in the alarm manager to allow user whitelisted apps
to have free access to scheduling alarms.

Coming next: lifting sync/job restrictions.

Bug #26851107: Allow user whitelist apps more freedom

(Cherry-picked to nyc since it got lost in the branch from master.)

Change-Id: I4dc9f07514627ebdb6b6eff7c7a749f2c51a3797