revert: background announcements speak even with in-app notifications on

Muting the region whenever toasts were on dropped announcements no toast
covers: "Stopped", a second request in the same run, and anything while the
window isn't focused. Hearing a completion twice with an opt-in setting on is
the smaller problem.

This reverts commit e0de7ef6dd.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
489ac649bdPR Batch Tester committed on 10/23/2026, 12:19:00 PMparent2cf37ee

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