Merge changes I97f97167,I4bf51c47,I8d3193e0,I224a1616,Ie774b0eb, ...

* changes:
  Adding HDMI_CEC_SWITCH_ENABLE Global property to enable/disable Routing Control feature.
  Fix spelling errors in HdmiCecMessage.toString
  More skeleton code for <RequestShortAuidoDescriptor>
  Add a getPhysicalAddress api to hdmicontrolservice.
  Set System Audio Mode on when switch to Audio Only source
  Call HdmiCecLocalDeviceAudioSystem to report audio status.
  Add a delay state into DeviceDiscoveryAction.