cmhw: Add stubs for SRE support

 * Add support for Sunlight Readability Enhancement, aka Facemelt Mode.
 * Optional dependency on adaptive backlight support, which is required
   in all current implementations.

Change-Id: Id25bb5fd384f3935383a5c7f5795ce17afc73b00
Hardware: Add high touch sensitivity support

Change-Id: Ia5ad3695ca253269dfe3a62420819ad9e9367f9c
Fix HighTouchSensivity (2/2)

Change-Id: Ic46d29eeb875eaf9d9f04b8595f9f07bb6ebbd1d
(cherry picked from commit 4acfb64e4b16216e0a82897227b0e031469a258a)