HDMICEC: Add CTS test for Active tracking of CEC Network for Playback devices

Implement CTS test that checks if a device is removed from the network when it doesn't answer to the polling message sent by HotplugDetection action.

Add method in BaseHdmiCecCtsTest to return the device list known by the DUT.

Bug: 199057329
Test: make && atest CtsHdmiCecHostTestCases
Change-Id: Iea00113341bf8720695d7ec487d01085cb6ff88a
(cherry picked from commit b65fbf4dceb15cf240d5365af97d0578818644ce)
Merged-In: Iea00113341bf8720695d7ec487d01085cb6ff88a
2 files changed