Remove <Report Audio Status> tests for TV

The way we handle these messages changed in b/191230338. These tests no
longer make sense, as we no longer notify AudioService at all when
receiving a <Report Audio Status> message.

Test: atest com.android.server.hdmi
Bug: 195935398
Change-Id: I85ebc3984d8a641e7743d5b2358806def5cffc0f