Update HDMI-CEC HAL interface for TV

Added a few more API:
 - is_connected
 - get_port_info
 - set_option
 - set_audio_return_channel

Also added another event type (tx_status) that reports the status
of transmission. The status is reported in asynchronous fashion
since the send operation can take longer due to bus conflict.

Change-Id: I75decb8451a23f8a8eda0895d58f22c45227c0b3
1 file changed