Adding flag com.android.window.flags.unify_back_navigation_transition to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/arc90fi000001?build_unique_id=android_platform_windowing_frontend
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 372230928
Change-Id: Ic132309e45e95cf04fb92e998fff50f7a81e630f
Flag: com.android.window.flags.unify_back_navigation_transition
Ignore-AOSP-First: AConfig change for future AOSP release
1 file changed