Fix PointerCoords Parcel incorrectly storing values as Int32

PointerCoords stores its values as float and its Parcel should
do the same. Wrong behaviour may be noticed when MotionEvent is
injected using Instrumentation method sendPointerSync. All its
PointerCoords values(size, orientation, pressure, etc) will be
casted to integer omitting their decimal part. This fix addresses
this issue.

Change-Id: Ifa3dfce4d5c2e6c060852f4208cb5684e827c7e6
Signed-off-by: Ilya Polenov <daioptych@gmail.com>