Updated MotionEvent to use Transform

Updated MotionEvent to use Transform instead of offset and scale. This
allowed a lot of simplification since it no longer needs to manually do
the transformation calculation and instead can rely on functions
provided by the Transform class.

Test: Input works
Test: inputflinger_tests
Test: libinput_tests
Bug: 158476194
Change-Id: Id40ae0184ca778507166e60d0d3eaf9564f3172b