Move remote animation utils to the Animation lib.

This is so that they can be used within the Animation lib itself, while
remaining available to all current users, since the SysUI shared lib
also depends on Animation lib.

Bug: 323863002
Flag: NA
Test: still builds, tests still pass, manually tested areas that depend
on these utils.

Change-Id: I10de17b51c05054efe957ed1073a1cbe6baf05c5