Add availabilityProvider attribute for roles.

This change adds a new availabilityProvider attribute for roles, thus
allowing the dialer and SMS role availability to work as before.

Bug: 110557011
Test: build
Change-Id: I03b7ba56189f549fb2326582e43628dbc9beebdf
11 files changed
tree: 1a4445e4718f5999dbeab6ac44b0448865516f48
  1. PermissionController/