Revert "[2/2] Settings: Slims Hardware Key Rebinding"

This reverts commit bd1c0fce4fe520e7e5cf6f6ae2c6f2983aef9790.

Conflicts:
	res/values/liquid_arrays.xml
	res/values/liquid_strings.xml
	res/xml/hardwarekeys_settings.xml
	src/com/android/settings/liquid/HardwareKeysSettings.java
Revert "Return of hardware keys backlight settings"

This reverts commit 06db4b782747cbc32e614488c31e9793496a1724.

Conflicts:
	res/values/liquid_strings.xml
	res/xml/hardwarekeys_settings.xml
	src/com/android/settings/liquid/HardwareKeysSettings.java
Add back hardware key settings.

Change-Id: I925fd9d9c02b86d8e93c8b9e25870433f7c20bde

Conflicts:
	proguard.flags
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	res/values/config.xml