chore: update `ios` background scheduling #522

Job	Run time
Build (Debug, ooni)	13m 10s
Build (Debug, dw)	13m 51s
Kotlin Lint	1m 21s
Common Tests	14m 9s
Android Lint	2m 32s
Firebase App Distribution (ooni)	1m 2s
Firebase App Distribution (dw)	53s
	46m 58s

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