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
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
m7-common: Set preferred AAPT density

* Set only XXHDPI

Change-Id: I9dd2674ecc9391f2d2465b5ad688881b8f877f43
Revert "Revert "m7-common: use permissive SELinux""

* Disable SELinux for bringup

This reverts commit 8795b860c38a01d9e776590aadec2ab6ee07192f.

Change-Id: I34b6435e2112ac5a6b41b76fc2ae4601cbe42d94