Revert "Load vibration scale gain from system properties"

Revert submission 29071407-scale-gain-system-property

Reason for revert: DroidMonitor: Potential culprit for http://b/365965907 - verifying through ABTD before submission. 

Reverted changes: /q/submissionid:29071407-scale-gain-system-property

Change-Id: I2fa76c68c6a065dd44457838d724adadb57d153c
3 files changed