Camera2: Smart scene icons w. original artwork

These are functional replacements for the smart scene indicators
created from scratch for CM, and fully owned by the project.

I'm sure the size, border weight may need some adjustment, but
they're currently identical to the burst mode indicators in:
http://review.cyanogenmod.org/#/c/55716/

Change-Id: Ia9e18aa2cd1f78b8ef3674e71cb151e522f2e139