Summary:
Changelog: [Internal] - Key cached values between different MotionEvents by pointerId.
Currently the implementation uses one cached list and array to store the last hitPath and event coordinates. We use these to determine if we've entered or left any views.
With more pointers, we need to be tracking these values for each pointer.
As well, clean up usage of `mLastTargetCoordinates`. This doesn't need to be a global as its an array that's updated by reference in `findTargetPathAndCoordinatesForTouch`
Reviewed By: vincentriemer
Differential Revision: D39152528
fbshipit-source-id: 28c18629bf974f41950401c7726a4757ad43ac28
Luna Wei
c34659a5d3