exynos9610: Squashed inclusion of MotCamera2

exynos9610: Squashed inclusion of MotCamera2

This is a squashed commit of:

Add Moto Camera 2 & priv-app permissions
* Snap APIv2 doesn't support our Aux Cam, or Camera
  Mods (considering they are removable and need special
  HAL handling for flash, internal Camera/USB disabling,
  etc.

* Snap APIv1 doesn't like our front-flash, or video
  recording audio (likely fixable). As well as the
  aforementioned lack of Camera Mod support.

* Mata ships Klik to support an external Camera "mod"
  and sets precedent for shipping OEM Cameras, so we're
  just going to go ahead and do it.

Change-Id: I7d5001e7f743cdb9aaeb70c032a19cc008209135 | AOSP
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Include MotoSignatureApp
* Needed for MotCamera2 to update via the Play Store.
* Also exclude from dex-opt'ing on host, as this app
  is known not to like that (see: shamu, clark).

Change-Id: Ibf2aafd731783fdae63b228460753457296de47c | AOSP
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Override Camera2 with MotCamera2 properly
* Possible as of https://review.lineageos.org/c/LineageOS/android_tools_extract-utils/+/314698.

Change-Id: I88808f7ab795099dc0ea1e80992d7c68aaa90167 | AOSP
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Change-Id: I89aa823bac2a2fa4b92d324cc0dbcdc6811468de