Fix 6398209: Lots of improvements to gesture search from navbar

- Added ability to postpone animations until after window is shown
to ensure the animation is visible on slower devices.
- Fixed layout bug that prevented targets from being located on
outer ring.
- Fixed bug where some motion events were being ignored when handle
wasn't captured.
- Reduced temp object generation in several methods.
- Added containers to start all animations together and to facilitate
delayed start.
- Increased radius of outer ring on phones to closer match mocks.
- Decreased sensitivity of swipe up gesture on navbar so it's harder to false.

Change-Id: I084f840115aef6496a1f87202c4e42d9962c8c3e