MapUserStyleObserver does not handle local JSON styles

Start with MapUserStyleObserver.kt at the referenced line and inspect how the style URL is handled when the style is loaded from MainCarSession.kt. Reproduce the Android Auto flow with a local JSON style, then verify that both local JSON and cloud-based styles avoid the reported IndexOutOfBoundsException.

Android API: 33
Mapbox Navigation SDK version: 3.0.4

Steps to trigger behavior

1. Use the android-auto example from this repo as a basis.
2. Load a map style from a local JSON file in android-auto-app/src/main/java/com/mapbox/navigation/examples/androidauto/car/MainCarSession.kt
3. Search a route to a destination and start a trip.

Expected behavior

Navigation SDK for Android Auto should handle both cloud-based as well as local JSON styles.

Actual behavior

The following error is thrown:

java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
    at java.util.Collections$SingletonList.get(Collections.java:5042)
    at com.mapbox.navigation.ui.androidauto.navigation.MapUserStyleObserver.updateState(MapUserStyleObserver.kt:29)
    at com.mapbox.navigation.ui.androidauto.navigation.MapUserStyleObserver.onAttached(MapUserStyleObserver.kt:19)
    at com.mapbox.navigation.ui.androidauto.navigation.roadlabel.CarRoadLabelRenderer.onAttached(CarRoadLabelRenderer.kt:77)
    at com.mapbox.maps.extension.androidauto.CarMapSurfaceOwner.registerObserver$extension_androidauto_release(CarMapSurfaceOwner.kt:54)
    at com.mapbox.maps.extension.androidauto.MapboxCarMap.registerObserver(MapboxCarMap.kt:149)
    at com.mapbox.navigation.ui.androidauto.freedrive.FreeDriveCarScreen$1.onResume(FreeDriveCarScreen.kt:46)
    at androidx.lifecycle.DefaultLifecycleObserverAdapter.onStateChanged(DefaultLifecycleObserverAdapter.kt:26)
    at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.jvm.kt:320)
    at androidx.lifecycle.LifecycleRegistry.forwardPass(LifecycleRegistry.jvm.kt:257)
    at androidx.lifecycle.LifecycleRegistry.sync(LifecycleRegistry.jvm.kt:293)
    at androidx.lifecycle.LifecycleRegistry.moveToState(LifecycleRegistry.jvm.kt:142)
    at androidx.lifecycle.LifecycleRegistry.handleLifecycleEvent(LifecycleRegistry.jvm.kt:124)
    at androidx.car.app.Screen.lambda$dispatchLifecycleEvent$1$androidx-car-app-Screen(Screen.java:340)
    at androidx.car.app.Screen$$ExternalSyntheticLambda1.run(Unknown Source:4)
    at androidx.car.app.utils.ThreadUtils.runOnMain(ThreadUtils.java:38)
    at androidx.car.app.Screen.dispatchLifecycleEvent(Screen.java:328)
    at androidx.car.app.ScreenManager.popInternal(ScreenManager.java:375)
    at androidx.car.app.ScreenManager.popToRoot(ScreenManager.java:216)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager.replaceTop(MapboxScreenManager.kt:235)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager.onReplaceTop(MapboxScreenManager.kt:230)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager.onScreenEvent(MapboxScreenManager.kt:210)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager.access$onScreenEvent(MapboxScreenManager.kt:68)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager$lifecycleObserver$1$onCreate$1$1.emit(MapboxScreenManager.kt:81)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager$lifecycleObserver$1$onCreate$1$1.emit(MapboxScreenManager.kt:81)
    at kotlinx.coroutines.flow.SharedFlowImpl.collect$suspendImpl(SharedFlow.kt:382)
    at kotlinx.coroutines.flow.SharedFlowImpl$collect$1.invokeSuspend(Unknown Source:15)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedTaskKt.resume(DispatchedTask.kt:235)
    at kotlinx.coroutines.DispatchedTaskKt.resumeUnconfined(DispatchedTask.kt:191)
    at kotlinx.coroutines.DispatchedTaskKt.dispatch(DispatchedTask.kt:163)
    at kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:474)
    at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl(CancellableContinuationImpl.kt:508)
    at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$default(CancellableContinuationImpl.kt:497)
    at kotlinx.coroutines.CancellableContinuationImpl.resumeWith(CancellableContinuationImpl.kt:368)
    at kotlinx.coroutines.flow.SharedFlowImpl.tryEmit(SharedFlow.kt:399)
    at com.mapbox.navigation.ui.androidauto.screenmanager.MapboxScreenManager$Companion.replaceTop(MapboxScreenManager.kt:292)
    at com.mapbox.navigation.ui.androidauto.preview.CarRoutePreviewScreen.onGetTemplate$lambda$2(CarRoutePreviewScreen.kt:128)
    at com.mapbox.navigation.ui.androidauto.preview.CarRoutePreviewScreen.$r8$lambda$cjvY8ej50Xno8ZQZK_I0s37EBd0(Unknown Source:0)
    at com.mapbox.navigation.ui.androidauto.preview.CarRoutePreviewScreen$$ExternalSyntheticLambda1.onClick(Unknown Source:2)
    at androidx.car.app.model.OnClickDelegateImpl$OnClickListenerStub.lambda$onClick$0$androidx-car-app-model-OnClickDelegateImpl$OnClickListenerStub(OnClickDelegateImpl.java:96)
    at androidx.car.app.model.OnClickDelegateImpl$OnClickListenerStub$$ExternalSyntheticLambda0.dispatch(Unknown Source:2)
    at androidx.car.app.utils.RemoteUtils.lambda$dispatchCallFromHost$0(RemoteUtils.java:148)
    at androidx.car.app.utils.RemoteUtils$$ExternalSyntheticLambda1.run(Unknown Source:6)
    at android.os.Handler.handleCallback(Handler.java:942)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loopOnce(Looper.java:226)
    at android.os.Looper.loop(Looper.java:313)
    at android.app.ActivityThread.main(ActivityThread.java:8762)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:604)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)
    Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@67854e4, Dispatchers.Main.immediate]

As far as I can tell, the reason seems to be this expectation of an URL scheme.