Unbundle RemoteService on TV - part 3

- New service TVRemoteService triggered by SystemServer
- Provider service proxy and watcher for maintaining connections to unbundled
  services which have the BIND_TV_REMOTE_SERVICE permission.
- Shared library to facilitate connections between unbundled service and
  TVRemoteService.
- Unbundled service needs TV_VIRTUAL_REMOTE_CONTROLLER
  permission to be fully functional.

b/23792608

Change-Id: Ief5c6995883d1f7268a73bdd0c920c4c3f42cddb