This is a rewrite of HdmiCecManager that exposes API for CEC Playback
device control. HdmiCecManager will be removed together with
HdmiCecService once the migration is completed.
Replaced direct access to CEC commands with the following 2 API:
- oneTouchPlay
- queryDisplayStatus
Each method requires communication with other device on CEC bus,
hence might take some time to finish. The result at the end of
protocol exchange is reported through a callback provided as a
parameter to the method.
The callback is based on interface not abstract class since
it has only one method 'onComplete'.
Change-Id: I41e9d4571f890303282a79a803c86530d0b46974
91120c541a