fix(mobile): Screens 5.0.0-t3.36 installs its search observer hook without a race

Screens 5.0.0-t3.36 stores NSNotificationCenter's original block-observer
implementation before installing the search field hook. Until now, a
registration on another thread in the moment between installing the
hook and storing the original called through a null pointer
(pingdotgg/react-native-screens#3).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
c3dafcf5e4Julius Marminge committed on 10/22/2026, 12:33:06 AMparente94ca8a

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