m7-common: Update HAL API versions and fix warnings

Change-Id: Ia5b9460a720645cf66b1bb889b04ab463055d4af
m7-common: utilize recovery_root_private

Prebuilt modules can be placed in the correct directory structure under
recovery/root and the build system will automatically copy them to the
recovery ramdisk.

Change-Id: I7b8b8bb2772a10afe9553a442476e6c5cf944b23

Conflicts:

	rootdir/Android.mk
m7-common: Disable denoise setting for camera

Enabling denoise causes camera to crash. Report that only "off" is
supported so that Camera2 removes the setting.

Change-Id: I6caab1d78cf24cc3b1b2faaa8a9d1b3d4c6e7715