Fallback to the first foregroundInactive window when there are no foregroundActive windows in RCTKeyWindow (facebook#44167)

Summary:
Pull Request resolved: facebook#44167

We received an issue for OSS where, when the main window is inactive and the system tries to present a dialog, the dialog is not presented in the right position on the screen.

This change introduce a fallback to the first inactive window (which is still visible on screen) and it fixes the issues.

## Changelog:
[iOS][Changed] - Fallback to the first `foregroundInactive` window when there are no `foregroundActive` windows in RCTKeyWindow

Reviewed By: dmytrorykun

Differential Revision: D56354741

fbshipit-source-id: fa23131ecd40f6d91c705879a72890506ee21486

Author: cipolleschi

packages/react-native/React/Base/RCTUtils.m

@@ -562,21 +562,37 @@ BOOL RCTRunningInAppExtension(void)
     return nil;
   }
 
-  for (UIScene *scene in RCTSharedApplication().connectedScenes) {
-    if (scene.activationState != UISceneActivationStateForegroundActive ||
-        ![scene isKindOfClass:[UIWindowScene class]]) {
+  NSSet<UIScene *> *connectedScenes = RCTSharedApplication().connectedScenes;
+
+  UIScene *foregroundActiveScene;
+  UIScene *foregroundInactiveScene;
+
+  for (UIScene *scene in connectedScenes) {
+    if (![scene isKindOfClass:[UIWindowScene class]]) {
       continue;
     }
-    UIWindowScene *windowScene = (UIWindowScene *)scene;
 
-    if (@available(iOS 15.0, *)) {
-      return windowScene.keyWindow;
+    if (scene.activationState == UISceneActivationStateForegroundActive) {
+      foregroundActiveScene = scene;
+      break;
     }
 
-    for (UIWindow *window in windowScene.windows) {
-      if (window.isKeyWindow) {
-        return window;
-      }
+    if (!foregroundInactiveScene && scene.activationState == UISceneActivationStateForegroundInactive) {
+      foregroundInactiveScene = scene;
+      // no break, we can have the active scene later in the set.
+    }
+  }
+
+  UIScene *sceneToUse = foregroundActiveScene ? foregroundActiveScene : foregroundInactiveScene;
+  UIWindowScene *windowScene = (UIWindowScene *)sceneToUse;
+
+  if (@available(iOS 15.0, *)) {
+    return windowScene.keyWindow;
+  }
+
+  for (UIWindow *window in windowScene.windows) {
+    if (window.isKeyWindow) {
+      return window;
     }
   }