feat(ios): encapsulate device info listeners (#49162)

Summary:
This PR encapsulates device info listeners removing additional logic from RCTAppDelegate which is a prerequisite for #49078

Now we use KVO (Key Value Observation) to listen to window size changes making this module's logic encapsulated + allows to use it in brownfield scenarios.

To keep backward compatibility RCTDeviceInfo still emits `RCTWindowFrameDidChangeNotification`

## Changelog:

[IOS] [ADDED] - encapsulate device info listeners

Pull Request resolved: #49162

Test Plan: Check if window size change listener is fired

Reviewed By: sammy-SC

Differential Revision: D69116660

Pulled By: cipolleschi

fbshipit-source-id: b9a57c70826b10cd27d102337eb1e35da1b365c9

Author: okwasniewski

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h

@@ -58,7 +58,7 @@ NS_ASSUME_NONNULL_BEGIN
                                                          (const facebook::react::ObjCTurboModule::InitParams &)params
  *   - (id<RCTTurboModule>)getModuleInstanceFromClass:(Class)moduleClass
  */
-@interface RCTAppDelegate : RCTDefaultReactNativeFactoryDelegate <UIApplicationDelegate, UISceneDelegate>
+@interface RCTAppDelegate : RCTDefaultReactNativeFactoryDelegate <UIApplicationDelegate>
 
 /// The window object, used to render the UViewControllers
 @property (nonatomic, strong, nonnull) UIWindow *window;

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm

@@ -62,21 +62,10 @@ - (void)loadReactNativeWindow:(NSDictionary *)launchOptions
   self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
   UIViewController *rootViewController = [self createRootViewController];
   [self setRootView:rootView toRootViewController:rootViewController];
-  _window.windowScene.delegate = self;
   _window.rootViewController = rootViewController;
   [_window makeKeyAndVisible];
 }
 
-#pragma mark - UISceneDelegate
-
-- (void)windowScene:(UIWindowScene *)windowScene
-    didUpdateCoordinateSpace:(id<UICoordinateSpace>)previousCoordinateSpace
-        interfaceOrientation:(UIInterfaceOrientation)previousInterfaceOrientation
-             traitCollection:(UITraitCollection *)previousTraitCollection API_AVAILABLE(ios(13.0))
-{
-  [[NSNotificationCenter defaultCenter] postNotificationName:RCTWindowFrameDidChangeNotification object:self];
-}
-
 - (RCTRootViewFactory *)rootViewFactory
 {
   return self.reactNativeFactory.rootViewFactory;

packages/react-native/React/CoreModules/RCTDeviceInfo.mm

@@ -32,10 +32,31 @@ @implementation RCTDeviceInfo {
   std::atomic<BOOL> _invalidated;
 }
 
+static NSString *const kFrameKeyPath = @"frame";
+
 @synthesize moduleRegistry = _moduleRegistry;
 
 RCT_EXPORT_MODULE()
 
+- (instancetype)init
+{
+  if (self = [super init]) {
+    [RCTKeyWindow() addObserver:self forKeyPath:kFrameKeyPath options:NSKeyValueObservingOptionNew context:nil];
+  }
+  return self;
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context
+{
+  if ([keyPath isEqualToString:kFrameKeyPath]) {
+    [self interfaceFrameDidChange];
+    [[NSNotificationCenter defaultCenter] postNotificationName:RCTWindowFrameDidChangeNotification object:self];
+  }
+}
+
 + (BOOL)requiresMainQueueSetup
 {
   return YES;
@@ -65,10 +86,6 @@ - (void)initialize
                                                name:RCTUserInterfaceStyleDidChangeNotification
                                              object:nil];
 
-  [[NSNotificationCenter defaultCenter] addObserver:self
-                                           selector:@selector(interfaceFrameDidChange)
-                                               name:RCTWindowFrameDidChangeNotification
-                                             object:nil];
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(interfaceFrameDidChange)
                                                name:UIApplicationDidBecomeActiveNotification
@@ -113,10 +130,10 @@ - (void)_cleanupObservers
 
   [[NSNotificationCenter defaultCenter] removeObserver:self name:RCTUserInterfaceStyleDidChangeNotification object:nil];
 
-  [[NSNotificationCenter defaultCenter] removeObserver:self name:RCTWindowFrameDidChangeNotification object:nil];
-
   [[NSNotificationCenter defaultCenter] removeObserver:self name:RCTBridgeWillInvalidateModulesNotification object:nil];
 
+  [RCTKeyWindow() removeObserver:self forKeyPath:kFrameKeyPath];
+
 #if TARGET_OS_IOS
   [[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
 #endif