Merge changes I9d4649ee,I454a6d22,Icaf172a5,Ib21162d7,I120801fd

* changes:
  Fix crash on TV device from casting error.
  When device reboots, it should not go to real standby.
  Use : hex format for HdmiCecMessage.toString
  Improve CEC logging
  Complete the HDMI_SYSTEM_AUDIO_CONTROL_ENABLED control logic in Audio System device.