Notify WindowSession about insets animation

When inset animations are running, VRI is setting the frame rate to HIGH.
The CL conveys this information to WM server to remove the app preferred
refresh rate, such that it doesn't override VRI's one.

Bug: 377991489
Change-Id: I4cae58e24bf3c112616881b79bf7b4a6c5ed6f27
Test: Bring up IME while app using a preferredRefreshRate
Flag: EXEMPT bugfix