Update animations for TM-QPR: Overview > OverviewSplitSelect transition

The animation from Overview to OverviewSplitSelect is now updated to the latest spec. See bug for details.
- New timings
- Task thumbnails slide in with a new spring animation
- Icons fade out and fade in appropriately
- SplitInstructionsView has a new compound "unfold" animation

Bug: 236760307
Test: Manual on tablet and phone. Looks good on both true and fake orientations.
Change-Id: If98d4464aa51c876d79bee9672279992a2cf9026