Adding flag com.android.libcore.post_cleanup_apis to RELEASE_CONFIG_TRUNKFOOD_STAGING.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/1rfjkai000001?build_unique_id=android_platform_core_libraries
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 331243037
Flag: com.android.libcore.post_cleanup_apis
Ignore-AOSP-First: AConfig change for future AOSP release
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:24d75f01cbc220bb1f5fe79ebc505d2235a57fd6)
Merged-In: Ibea80f81517931f93eb9e87a25d9bba6fccbd635
Change-Id: Ibea80f81517931f93eb9e87a25d9bba6fccbd635