HDMICEC: Add equals test for HdmiCecMessage

Bug: 168713324
Test: atest HdmiCecMessageTest#testEqualsHdmiCecMessage
Change-Id: I31ddbed919ccf7a52824a0252c8d1db35bb6ebd9
Merged-In: I31ddbed919ccf7a52824a0252c8d1db35bb6ebd9
1 file changed