perf: Add Magnetometer.DispatchReading export

src/Uno.UI/ts/Windows/Devices/Sensors/Magnetometer.ts

@@ -17,7 +17,11 @@ namespace Windows.Devices.Sensors {
 		public static initialize(): boolean {
 			try {
 				if (typeof window.Magnetometer === "function") {
-					this.dispatchReading = (<any>Module).mono_bind_static_method("[Uno] Windows.Devices.Sensors.Magnetometer:DispatchReading");
+					if ((<any>globalThis).DotnetExports !== undefined) {
+						this.dispatchReading = (<any>globalThis).DotnetExports.Uno.Windows.Devices.Sensors.Magnetometer.DispatchReading;
+					} else {
+						this.dispatchReading = (<any>Module).mono_bind_static_method("[Uno] Windows.Devices.Sensors.Magnetometer:DispatchReading");
+					}
 					let MagnetometerClass: any = window.Magnetometer;
 					this.magnetometer = new MagnetometerClass({ referenceFrame: 'device' });
 					return true;

src/Uno.UWP/Devices/Sensors/Magnetometer.wasm.cs

@@ -5,6 +5,8 @@ using Uno;
 using Uno.Devices.Sensors.Helpers;
 
 #if NET7_0_OR_GREATER
+using System.Runtime.InteropServices.JavaScript;
+
 using NativeMethods = __Windows.Devices.Sensors.Magnetometer.NativeMethods;
 #endif
 
@@ -70,6 +72,9 @@ namespace Windows.Devices.Sensors
 		/// <param name="y">Magnetic field Y</param>
 		/// <param name="z">Magnetic field Z</param>
 		/// <returns>0 - needed to bind method from WASM</returns>
+#if NET7_0_OR_GREATER
+		[JSExport]
+#endif
 		public static int DispatchReading(float x, float y, float z)
 		{
 			if (_instance == null)