HDMI: Dismiss "Are you still watching" UI on OTP from source device.

When OTP was triggered from source device, CEC framework expected a <Set Stream Path>/<Routing Change> from the TV to dismiss the UI. This message might come slower, after the TV really changed the input to source's path.

Change-Id: I97305b1c12d28763b45ef42633f121137fef6369
Test: m
Bug: 362994774
Flag: EXEMPT bug fix