Source device to toggle and follow TV power

For source devices, toggleAndFollowTvPower() will result in
1. Toggling of the HDMI-connected display (=TV) power state over CEC
2. The source device following the TV power state

Bug: 167962015
Test: atest HdmiCecLocalDevicePlaybackTest

Change-Id: I1881c279143075629e590501de82fadc3e1d56d6