Process DEEP_PRESS in GestureDetector

GestureDetector can now send the long press event sooner,
if a force touch has been detected by the system.
At the same time, we need to inhibit any scrolling action whenever the
CLASSIFICATION_AMBIGUOUS_GESTURE is set.

Bug: 62940136
Test: used HeatMapDemo app to register GestureDetector
and print out messages. Also observed the CLASSIFICATION_DEEP_PRESS
to ensure events are correlated.

Change-Id: I82ac1cc43d35df69a7a9649c628b995074394be6