Introduce PathInterpolator to native animators

For interpolators defined with a path, PathInterpolator is more accurate
and likely less costly for longer animations than what are currently
using as a substiute - LUTInterpolator.

Test: manual test and added a unit test
BUG: 32830741
Change-Id: I867c7a28e4261392cce9c45a2992ab4fd120c496