Remove valid_mask from audio.h

As valid mask only using in hal to indicate which fields of microphone
characteristics is available and it is not used in other case, we can
only keep it in hal layer instead of audio.h.

Bug: 79272216
Test: run cts
Change-Id: I3abe3e4f2496d4c3093849002324bffbb738ec0f
1 file changed
tree: c225e4a7ccc7c115f24d6abb74ba92b6ede7456e
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk