Block "ForTesting" media IPC endpoints when not testing. This includes: SetMediaOverridesForTesting() TriggerBeginInterruptionForTesting() TriggerEndInterruptionForTesting()
<rdar://problem/105837347>
Pull request: https://github.com/WebKit/WebKit/pull/10595
Committed 260935@main (106f26304309): <https://commits.webkit.org/260935@main> Reviewed commits have been landed. Closing PR #10595 and removing active labels.