Rename flag ADD_TRANSIENT_HUN_IN_STACK_STATE_ANIMATOR

Renamed the flag ADD_TRANSIENT_HUN_IN_STACK_STATE_ANIMATOR to
UNCLEARED_TRANSIENT_HUN_FIX because the fixing method has already
changed. Add @JvmField for Test usage.

Bug: 297950089
Test: Manual
Change-Id: I052e1532329f3b83ce4bf7b9bcfdda0e8df95029
1 file changed