MoKeeLauncher: add MultiTouch support

Change-Id: I86a48ea3f54d6002cf5bf6a8faffbc354be9e882
MoKeeLauncher: fix preview when config_workspaceDefualtFadeInAdjacentScreens is true

Change-Id: I8b17e03a493edef875a12e63d7485dc713e98f5e