Launcher3: add gesture options

part of https://github.com/AICP/packages_apps_Launcher3/commit/1d43c42941fd3ae9478c7cac7555363ff83f428d
to add gestures category
AICPFied by @eyosen: Also includes grouping parts of
Iba1458f2988259a3448490c67a238cd13940e900
Stripped flashlight gestures from it. But kept the
infrastructure in place for future additions

Change-Id: Ibe4199821cad5e129aa28bed5fd6ddb4250b3597
12 files changed