Remove enabled flag defer_predictive_animation_if_no_snapshot...

...and always_capture_activity_snapshot, both are enabled since
25Q1 release.

Bug: 362183912
Bug: 374621014
Flag: EXEMPT removing com.android.window.flags.always_capture_activity_snapshot
Flag: EXEMPT removing com.android.window.flags.defer_predictive_animation_if_no_snapshot
Test: presubmit
Change-Id: I103a20adf772b65e1050507a675e814eba61b41a