Revert "Frameworks: hw key rebinding. Allow virtual keys to preload recents"

This reverts commit 68434f8b163b0d59142352e4257a965bdfa41e0f.
order
WIP [1/2] Slims Hardware Key Rebinding

See https://review.carbon-rom.com/#/c/320/

Change-Id: I25641f3d41232ccb81c0e57c2bfca9131a57df82

Conflicts:
	core/java/android/provider/Settings.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java