Exempt assistant for background mic on role grant

When the device is upgraded the app which holds the assistant role
should get the background microphone permission granted if they already
hold the foreground permission.

Test: new tests
Bug: 158311343
Change-Id: Id4f7685ec1d59c9353f74c0dc84789b524589d80
18 files changed
tree: c4cfecb997af389e8cee66b2656d697dfb0da883
  1. PermissionController/