Settings: Add CMHW vibrator intensity preference

Port the related changes from the following cm-13.0 commits:
a284b34f settings: Squashed commit of CMHW features
d4ebf3a5 Settings: Cleanup display settings code
ba4c43f7 Settings: Change to CmHardwareService
d2d9f452 settings: Move CMHW to CMSDK
bd3fe676 Add isSupported() method to VibratorIntensity class
9c353384 Settings : Add multiuser support for CMHardware
bac46048 Settings: Fix one-time vibration intensity restore
a3a64ce7 Settings: Rework vibration intensity slider
76997a78 Settings: Save vibration intensity on close
a44bfb5a Settings: Move vibrator value restore to onActivityStop
9176a64e Settings: Improve vibrator intensity dialog layout

Change-Id: Iece36085f8f07a171affefd9a1027fb11fed5d93