Feature abort when receiving the wrong format message of <System Audio Mode Status>

TCL issue 1-1. (different solution)
Some soundbars respond to <System Audio Mode Status> with wrong format, and that will make it fail to connect.
To fix this, check <System Audio Mode Status> message format before handling it; if it's wrong, send feature abort with reason "Invalid Operand".

Bug: 244529779
Bug: 230663730
Test: Unit tests
Change-Id: I3d2e008f8e5f9ac3956d3de5382b95f1aeca7a9e