Revert^2 "Attach defer_outgoing_bcasts flag."

This reverts commit cc00ed9ca3952f6af97052011642a155d4edb150.

Reason for revert: The issue has been addressed by using a read-only flag.
Bug: 327496592
Change-Id: I7181a3f1fdaed44b420184f7a29cff4eda4dcc4a
3 files changed