Using USAGE_HARDWARE_FEEDBACK in authentication haptics.

This usage will continue to play authentication haptics when battery
saver is on, and when the touch feedback slider in Vibration & Haptics
is set to zero. In addition, it will avoid authentication haptics to be
re-scaled as a result of adaptive haptics.

Test: manual. Verified that authentication haptics behave as expected
  with biometrics and bouncer authentication.
Flag: EXEMPT minor change to vibration attributes.
Bug: 436157447
Change-Id: I08ffdfa75a9d889a4c23c106f70188bd29d89bb8