Stylus gestures features (1/2)

Forward-port of https://github.com/CyanogenMod/android_frameworks_base/commit/9f3ee9f7c0877fcfbe90a7c176481f949194fb75
to JB

Change-Id: I9c8a03dce226d2463659846ff3a12435efdf5c1d

Conflicts:
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml
	policy/src/com/android/internal/policy/impl/PhoneWindow.java