gestures: allow to expand status bar

Change-Id: I2d5795709303ddf062f1f9c430fc812b96a7fdc5
gestures: allow to define longpress gesture

if set to ACTION_NOTHING, it does the default gesture
else it processes the custom action

Change-Id: Id1d2b53b98370858ce3c3b73274a7b8106761bd9