SmartScrim on ambientcue

New type of scrim that has two components:
- A glow under the navbar or recents button
- 2 glows under the action list

It doesn't animate anymore, which is better for performance and battery
life. The turbulence shader was also removed.

Fixes: 423382448
Test: atest ShortPillScreenshotTest
Test: atest NavBarPillScreenshotTest
Test: atest ActionListScreenshotTest
Flag: com.android.systemui.enable_underlay
Change-Id: Ie1fff47dba2afba155d458648dfd556a8215a8f4