Separate desktop and fullscreen carousel

- setRunningTaskHidden now changes attachAlpha only, stableAlpha is untouched as part of the attach animation, so both alpha can be set independently without interferring with each other
- During swipe up, hide task of differnt type (fullscreen/desktop) from the carousel, apply unhide when the gesture settles
- Update the min/max alpha calculation when a type of task is hidden from the carousel

Fix: 353950224
Test: Quick switch, swipe up, and scroll in Overview with and without Desktop tile, on phone and tablet
Test: presubmit test on quickswitch and swipe up
Flag: com.android.launcher3.enable_large_desktop_windowing_tile
Change-Id: I0a63da3ee3e55f4d1edbc53b2a4c5fccda2af387