Hammerhead camera: Fix unused variables

For build-system CFLAGS clean-up, fix unused variables.

This only cleans the parts of this project using -Werror.

Change-Id: I26ee6aa9c08c3f7ff5a28e4995bbcc4748910e94
hammerhead: Add sepolicy for hardware tunables

Change-Id: Icd4588175c1fca628fa3027d6cefd53fab7c90e7

Conflicts:
	sepolicy/file.te
	sepolicy/system_app.te
Revert "sepolicy: updates for cmhw"

This reverts commit 27e585609d9f90eae1a307e2d870207e995cf89b.

Conflicts:
	sepolicy/file.te
	sepolicy/system_app.te