Updates quickswitch animation from Launcher.

 - Workspace/All Apps/Hotseat no longer translate down
 - Fading of these elements and scaling of Workspace are tied to the
   wallpaper depth animation
 - At any point in the drag, you can still swipe up to enter Overview

This makes it feel like the apps are tied to the wallpaper and avoids
moving them orthogonally to the finger.

It also makes the "No recent items" animation more elegant.

Demo: https://drive.google.com/file/d/1phuRCqb69vuMp3ijS6PR5lTEcBHScjie/view?usp=sharing&resourcekey=0-2HXtMLUhQ-YU53hYlYV-fQ
Demo with no recent apps: https://drive.google.com/file/d/1wjexqznxs9ZhiUtCDW4-ZK6c7hKDRaXn/view?usp=sharing&resourcekey=0-GugbpJK8_cnFbUBB2Ar30w

Fixes: 174228745
Test: Manual
Change-Id: I1574ff89a0f382b7e63bf03cf4300ec7c695cfec