Revert "SlimRecents: Rework show top most task feature"

This reverts commit 673549e391eb97437b1b567ade987f49172cffcb.
Revert "Slim Recents: Always show topmost task collapsed"

This reverts commit 42cb7b1ba265a1945e0291d58d3a9b12e0838fbe.
Revert "[1/2] Frameworks: Slim recent app screen"

This reverts commit 273369f4b115c5d00b77b14f6cc79ef3ec4ef8b0.

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/custom_symbols.xml
	packages/SystemUI/res/values/custom_colors.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java