Add flag com.android.window.flags.mirror_surface_api to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/a2q2t36000001?build_unique_id=com.android.window.flags.mirror_surface_api-platform
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 437391557
Flag: com.android.window.flags.mirror_surface_api
Ignore-AOSP-First: Flag change added internally for future AOSP release
Change-Id: I732d2f20a7deb2cf82d0827d5be5c1acaec414c4
1 file changed