Don't use SF choreographer instance for PIP transition.

See b/222698397 for context. This makes jank data show up correctly
for the PIP transition CUJs.

Bug: b/352744636
Bug: b/b/222698397
Test: manual with Perfetto & atest PipAnimationControllerTest
Flag: EXEMPT bug fix
Change-Id: I5b3436af1c31aad0acb81e210f6b1dfbdf773c58