Add animation override to TaskFragmentAnimationParams

It's to support the overlay transition and we could
also support animation customization in the future.

Bug: 295805497
Test: presubmit
Flag: com.android.window.flags.move_animation_options_to_change
Flag: com.android.window.flags.activity_embedding_overlay_presentation_flag

Change-Id: Ia2105de1a8b20e3d9c2153a726f450b654b572ff