1. The up event for a long press was not properly adjusted as the
long pressing finger may not be on top of the accessibility
focused item.
2. There was a scenario where two finger swipe leads to a crash.
One finger moves, second finger goes down but no finger moves,
the first finger goes up, and now the second finger moves. All
this has to happen before we decided that user is touch exploring.
Very hard to happen, this is why we could not easily repro the
crash.
3. We use the two finger vector angle to determine whether the
user is dragging or not. However, in some cases we were
unnecessarily waiting too long before performing the check
and as a result the notification shade on Manta was not
expandable.
bug:11341530
bug:11189225
Change-Id: Ieea39783444a1c20581f8addfd518d1c11485099
a3315270e0