Delegate HdmiCecService method impl to HdmiCecDevice subclass

Most of the methods in the interface IHdmiCecService should be implemented
based on the device type. This CL makes a change such that the HdmiCecDevice
just has stub methods that should be overriden by subclasses.

Other changes:
  - Fixed a bug of <Inactive Source> not sending its physical address
    in its message body. Also the command should have been sent to TV
    only rather than broadcast.

  - Put back sendGiveDevicePowerStatus interface method. It allows the client
    to keep track of the other device(like TV) power status more closely.
    Devices goes through the status from standby -> transient to on -> on
    but the CEC spec doesn't require that they broacast it actively.

    The restored method can be used to let the playback device to get
    up-to-date power status of TV/display when it is booting up.

    This method should work the same across all the device types. So it was
    implemented in the service, not delegated to HdmiCecDevice.

  - Send <Report Physical Address> when a new logical device is registered,
    which is required by CEC spec: "it should report the association between
    its logical and physical address by broadcasting <Report Physical
    Address>

Change-Id: Iac1d2cf5783d947f2dcd6965a54670fbdb8e6a63