Advance RELEASE_LIBBINDER_BINDER_OBSERVER to true in trunk_staging

This commit was automatically created by a workflow in Gantry:
https://releasetracker.partner.android.com/changes/8f4jdgq000001?stage_id=98rjbdq000001

Flag: RELEASE_LIBBINDER_BINDER_OBSERVER
Ignore-AOSP-First: Flag change added internally for future AOSP release
Workflow-User: miloslav@google.com
Bug: 407694522
Change-Id: Ie59ac02dd54034bb6482f6ee86e5950f7ee0960e
1 file changed