feat(react-native): Add trackColor to SwitchProps (#29477)

Closes #29466

types/react-native/index.d.ts

@@ -8080,6 +8080,8 @@ export interface UIManagerStatic {
 export interface SwitchPropsIOS extends ViewProps {
     /**
      * Background color when the switch is turned on.
+     *
+     * @deprecated
      */
     onTintColor?: string;
 
@@ -8095,6 +8097,13 @@ export interface SwitchPropsIOS extends ViewProps {
 }
 
 export interface SwitchProps extends SwitchPropsIOS {
+    /**
+     * Custom colors for the switch track
+     *
+     * Color when false and color when true
+     */
+    trackColor?: { false: string, true: string };
+
     /**
      * If true the user won't be able to toggle the switch.
      * Default value is false.

types/react-native/test/index.tsx

@@ -53,6 +53,7 @@ import {
     ScrollView,
     ScrollViewProps,
     SectionListRenderItemInfo,
+    Switch,
     RefreshControl,
     TabBarIOS,
     NativeModules,
@@ -807,3 +808,8 @@ const NativeBridgedComponent = requireNativeComponent("NativeBridgedComponent",
         nativeProp: true,
     }
 });
+
+
+const SwitchColorTest = () => (
+    <Switch trackColor={{ true: 'pink', false: 'red'}} />
+)