Camera button support 2/2

ported from: https://github.com/CyanogenMod/android_frameworks_base/commit/e0749499766be45165b912d0c6400f4c69982fe4

credit: CM
Signed-off-by: anerikg <anerikgames@gmail.com>

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/config.xml
	core/res/res/values/liquid_symbols.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Conflicts:
	core/res/res/values/config.xml

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/config.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java