Add flag com.android.net.flags.tethering_request_virtual to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/di78imi000001?build_unique_id=android_platform_android_core_networking
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 340376953
Flag: com.android.net.flags.tethering_request_virtual
Ignore-AOSP-First: AConfig change for future AOSP release
Change-Id: Ia69c136beb9447bd9f5f61fe0b3d415117fb61eb
1 file changed