Device.mk tweaks
find7a: add default/automatic brightness overlays

- enable autobrightness by default
- make default brightness 82 / 32%
- make default screen timeout 30 seconds

from hammerhead overlays

Change-Id: I4a7829d8ee54d36d4f5208e01cd9bce0d5c9367b
find7a: Start adsprpcd

Change-Id: If39b39e440ff3c5b5fe3ea1f72f2a7152ee88f51
find7a: init: Add rfs_access daemon

Change-Id: I8bd45b027ecb72bcbfd5d065452edae0270dd5e3