- Fix issue where notifications were positioned offscreen after
quick screen toggle.
- Better QS scrim hiding, use existing layout transition.
- Don't allow a reposition if the settings animation is currently
running.
- Delay chevron animation during toggle to avoid drawing over each
other.
- Keep the screen on while the user is poking around with QS on
the keyguard.
- Cap the QS expansion to the bottom of the status view on keyguard.
Change-Id: Ib63874d0c6a33db81923080f25cb8f208e614faf
f0b06c7738