Guard Choreographer buffer stuffing recovery behind flag

Recent changes to how buffer stuffing is detected changes
the assumptions for when recovery should occur, and those
changes were missed in being guarded by the appropriate flag.

Fixes: b/383893971
Test: presubmit, SysUI Jank Regression Dashboard
Flag: android.view.flags.buffer_stuffing_recovery
Change-Id: I07cec9c22af0078ee447614f4885d21cb4305171