Skip gapless offload test when offload is not currently possible. Bug: 286176933 Bug: 326555684 Test: atest AudioTrackOffloadTest Change-Id: If932e4f38ee591e8ef903eab83c3e0a6f4466e2a Merged-In: If932e4f38ee591e8ef903eab83c3e0a6f4466e2a