CEC: Add AIDL interface

Split and convert to AIDL the HDMI CEC HAL into two separate HALs -
CEC and HDMI. CEC handles the CEC messages while HDMI handles the
hotplug and physical ports.
Also add the default and VTS for the two HALs.

Bug: 233026642
Test: m android.hardware.tv.cec-update-api
      make
Change-Id: I67c6d7aeea6922f69a1ffa7acb36c811c80afabf