Removing flag com.android.wm.shell.enable_optional_bubble_overflow from trunk_staging. This change was automatically created by rolling back a Gantry workflow. Bug: 334175587 Change-Id: I6948b48b10894c335bdc7bb4c2a40880ba88f5b8 Flag: com.android.wm.shell.enable_optional_bubble_overflow Ignore-AOSP-First: AConfig change for future AOSP release