AudioTrack: Fix track creation of 9.1.4 and 9.1.6 streams

Required support if the platform supports 14 or 16
channels internally, otherwise CTS test fails.

Test: atest AudioTrackTest#testImmersiveAudio
Bug: 202162797
Change-Id: I052f2e38a27a63e5304b7fb6bffaaabe37efa8eb