Refactor handling sequences in HdmiControlService

- Rewrote some methods to match more closely to the handling
  sequences in guideline
- Added setControlEnabled() API in the aidl
- Handled <Routing Control> command
- Handled some scenarios invoking RoutingControlAction

Change-Id: I5db0c6fc775cef709c2e0f338b85937deebf2a54