CEC: Add VTS test to check is connected am: b75639ca66 am: de3c301a52 am: ae30530f38 am: 586fe14899

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1584905

Change-Id: Ic105cb9dc6e7d1c7e99c44d4a321206b47bf56ce