Keyboard: Add lib for gestures

Respecting these commits

https://github.com/crdroidandroid/android_packages_inputmethods_LatinIME/commit/0d35adbeabe5ec827f97db739c057d990a9f78df

https://github.com/crdroidandroid/android_packages_inputmethods_LatinIME/commit/1f1cb9689d8dc9b3171d709d8b6bdfd57cf20a50

Help our AOSP Keyboard to work with gestures