audio-hal: use powerHAL 1.2 to do performance hint

1) Add PowerHAL 1.2 client
2) call PowerHAL powerhint on msm8998 instead of perfd

Test: Play audio and see powerhint handled
Bug: 62041945
Change-Id: I33ab8eaa7a3a3a953fb6531e0864b4ed62387ba2
4 files changed
tree: 3a4e9dbbcd7a16eb1e0ef92fea686085fcb5b819
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk