Remove flag android.os.force_concurrent_message_queue from trunk_staging. This change was automatically created by rolling back a Gantry workflow. Bug: 336880969 Flag: android.os.force_concurrent_message_queue Ignore-AOSP-First: AConfig change for future AOSP release Change-Id: I09188cca1b006f5e2aa506a3aa6f7da304511475