fix(iOS): fix animating Switch component value change (#46173)

Summary:
This PR fixes animating controlled `Switch` component when it's initial value is set to `false`

When initial value was set to `false`, `_isInitialValueSet` flag wasn't changed to `YES`, because `oldSwitchProps.value` &`newSwitchProps.value` were equal, which resulted in controlled `Switch` component being updated without animation on first value change

This PR fixes it by moving setting `_isInitialValueSet` flag to the end of `updateProps` method

## Changelog:

[IOS] [FIXED] - Fix animating Switch component value change in Fabric

Pull Request resolved: #46173

Test Plan:
1. Open `Switch` example in `RNTester`
2. In `Change events can be detected` section press switch that is `off` by default
3. Switch under it should change with animation

Reviewed By: javache

Differential Revision: D62377771

Pulled By: cipolleschi

fbshipit-source-id: 0213287c935db79a199b086ebb36a6979df03913

packages/react-native/React/Fabric/Mounting/ComponentViews/Switch/RCTSwitchComponentView.mm

@@ -63,7 +63,6 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
   if (oldSwitchProps.value != newSwitchProps.value) {
     BOOL shouldAnimate = _isInitialValueSet == YES;
     [_switchView setOn:newSwitchProps.value animated:shouldAnimate];
-    _isInitialValueSet = YES;
   }
 
   // `disabled`
@@ -86,6 +85,8 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
     _switchView.thumbTintColor = RCTUIColorFromSharedColor(newSwitchProps.thumbTintColor);
   }
 
+  _isInitialValueSet = YES;
+
   [super updateProps:props oldProps:oldProps];
 }