Consistent vibration for ramping ringer on P4

On P4 devices, we currently can only do audio-coupled haptics with
ramping ringer. This cl fixes the bug. It gives us option to play normal
vibration with ramping ringer on P4 so that we can have consistent
function across all Pixel devices.

Bug:143305848
Test: tested on all Pixel devices.
Change-Id: I3e50fbeb8878b9620b7807ba53a650e38a3280ad