Replace RemoteCallback with AndroidFuture in PermControler

- saves ~3 allocation per ipc
- no longer need to [un]bundleize result
- will become typesafe down the road (b/132732312)

Test: atest android.permission.cts.PermissionControllerTest
Change-Id: I6cd9ec5ae31179474536f22f557afb0d9db6a4b9