fix(crash): Convert to list before iterating to prevent crash

[TheScarastic]

08-24 14:45:13.062  2737  2737 D AndroidRuntime: Shutting down VM
08-24 14:45:13.065  2737  2737 E AndroidRuntime: FATAL EXCEPTION: main
08-24 14:45:13.065  2737  2737 E AndroidRuntime: Process: com.google.android.gms, PID: 2737
08-24 14:45:13.065  2737  2737 E AndroidRuntime: java.util.ConcurrentModificationException
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1603)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at java.util.HashMap$ValueIterator.next(HashMap.java:1631)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at org.microg.gms.auth.phone.SmsRetrieverCore.onDestroy(SmsRetrieverCore.kt:237)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.DefaultLifecycleObserverAdapter.onStateChanged(DefaultLifecycleObserverAdapter.kt:29)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.kt:322)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.LifecycleRegistry.backwardPass(LifecycleRegistry.kt:273)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.LifecycleRegistry.sync(LifecycleRegistry.kt:290)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.LifecycleRegistry.moveToState(LifecycleRegistry.kt:143)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.LifecycleRegistry.handleLifecycleEvent(LifecycleRegistry.kt:126)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at androidx.lifecycle.ServiceLifecycleDispatcher$DispatchRunnable.run(ServiceLifecycleDispatcher.kt:92)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at android.os.Handler.handleCallback(Handler.java:995)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:103)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at android.os.Looper.loopOnce(Looper.java:248)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:338)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:9067)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
08-24 14:45:13.065  2737  2737 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
08-24 14:45:13.067 19906 19906 D WM-DelayedWorkTracker: Scheduling work b7fecd0d-81b3-4c4f-a950-ab830f6b27a5

[althafvly]

@mar-v-in could you take a look?

[mar-v-in]

This is a duplicate of #3626 (which is scheduled to land in the next release).