Rename RCTRootViewFrameDidChangeNotification as it's not trac… (facebook#39835)

Summary:
…king root view frame changes

Looking through where this was introduced (facebook#37649), it seems the notification went from tracking root view size changes to window size changes. However, it was not renamed. I was using it for root view changes in RN-macOS, which.. I guess I'll refactor. Meanwhile, let's update the name?

## Changelog:

[IOS] [CHANGED] - Rename `RCTRootViewFrameDidChangeNotification` as it's not tracking root view frame changes

Pull Request resolved: facebook#39835

Test Plan: CI should pass

Reviewed By: cipolleschi

Differential Revision: D50173742

Pulled By: javache

fbshipit-source-id: 4651696174c439800984a5e6cf642200bb9c4f3c

Author: Saadnajmi

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

@@ -235,7 +235,7 @@ - (void)windowScene:(UIWindowScene *)windowScene
         interfaceOrientation:(UIInterfaceOrientation)previousInterfaceOrientation
              traitCollection:(UITraitCollection *)previousTraitCollection API_AVAILABLE(ios(13.0))
 {
-  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRootViewFrameDidChangeNotification object:self];
+  [[NSNotificationCenter defaultCenter] postNotificationName:RCTWindowFrameDidChangeNotification object:self];
 }
 #endif // [macOS]
 

packages/react-native/React/Base/RCTConstants.h

@@ -16,7 +16,7 @@ RCT_EXTERN NSString *const RCTUserInterfaceStyleDidChangeNotificationTraitCollec
 RCT_EXTERN NSString *const RCTUserInterfaceStyleDidChangeNotificationAppearanceKey;
 #endif // macOS]
 
-RCT_EXTERN NSString *const RCTRootViewFrameDidChangeNotification;
+RCT_EXTERN NSString *const RCTWindowFrameDidChangeNotification;
 
 /**
  * This notification fires when the bridge initializes.

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

@@ -20,7 +20,7 @@
 NSString *const RCTUserInterfaceStyleDidChangeNotificationAppearanceKey = @"appearance";
 #endif // macOS]
 
-NSString *const RCTRootViewFrameDidChangeNotification = @"RCTRootViewFrameDidChangeNotification";
+NSString *const RCTWindowFrameDidChangeNotification = @"RCTWindowFrameDidChangeNotification";
 
 NSString *const RCTJavaScriptDidFailToLoadNotification = @"RCTJavaScriptDidFailToLoadNotification";
 NSString *const RCTJavaScriptDidLoadNotification = @"RCTJavaScriptDidLoadNotification";

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

@@ -82,7 +82,7 @@ - (void)initialize
 
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(interfaceFrameDidChange)
-                                               name:RCTRootViewFrameDidChangeNotification
+                                               name:RCTWindowFrameDidChangeNotification
                                              object:nil];
 }