Torch: Torch UI Refresh

* Redesign based on:
https://github.com/jackmu95/android_packages_apps_FlashLight

* Remove strobe

* Tuck High brightness away into overflow menu

Change-Id: Id7ee193f2efd118d9ada2bcc6ad39a24d109f714
Signed-off-by: Roman Birg <roman@cyngn.com>