Apply intensity control for haptic data.

Use the same logic in VibrationEffect.scale to control the intensity of
haptic playback in audio framework. Note that as the maximum amplitude
of vibrator is 255, convert the haptic data to pcm_8_bit before doing
scaling.

Test: Manually
Change-Id: I6136d27c9255a215834b6e3092aa8ad696fbae04
6 files changed