Remove cm clear all button [1/2]

Revert "[Base]: recents panel clear all button tweaks"

This reverts commit c1c377b70af61b02c1a2c5fbfca417b2db43d13b.

Revert "Fix up 'clear recents' UX."

This reverts commit dfe8e7f33cc6bb8135f1dfffebfd8e66c4f39635.

Revert "Fix - place Clear Recents button above the nav bar"

This reverts commit b153b04987c096d20521d29268fa1e57d7056bbb.

Revert "Add clear all recents action to recents panel"

This reverts commit 3adbbd93be89992ba9fdfb3b0c084a6c35503126.

Conflicts:
	packages/SystemUI/res/values/strings.xml

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/values/strings.xml
	packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java