add ON_SET change modes with additional cleanup

- ON_CHANGE: added further clarification on behavior with set
- ON_SET: This is for property where event will be sent
  only when it is set from outside android.
  Good example can be a clock. There is no need to send time every time
  it is updated (it will keep increasing per each sec) as android side
  only needs to synchronize it at once during boot up.
  This property needs to send events only when user other components
  sets it from outside android.
- add audio contexts to audio focus response so that ON_CHANGE model
  works for it.
- drop CONTINUOUS from HVAC temperatures.

bug: 28742600

Change-Id: I7f0a110e2c15626681328dcea61b8c0e7bb6a9ff
(cherry picked from commit 7eb5ffdb14e7b0aebd3a635028b464f8a4a200f0)
1 file changed