Add android platform check inside android-device-discovery.

Author: KristianDD

mobile/mobile-core/android-device-discovery.ts

@@ -13,7 +13,8 @@ export class AndroidDeviceDiscovery extends DeviceDiscovery implements Mobile.IA
 	private isStarted: boolean;
 
 	constructor(private $injector: IInjector,
-		private $adb: Mobile.IAndroidDebugBridge) {
+		private $adb: Mobile.IAndroidDebugBridge,
+		private $mobileHelper: Mobile.IMobileHelper) {
 		super();
 	}
 
@@ -29,7 +30,10 @@ export class AndroidDeviceDiscovery extends DeviceDiscovery implements Mobile.IA
 		this.removeDevice(deviceIdentifier);
 	}
 
-	public async startLookingForDevices(): Promise<void> {
+	public async startLookingForDevices(options?: Mobile.IDeviceLookingOptions): Promise<void> {
+		if (options && options.platform && !this.$mobileHelper.isAndroidPlatform(options.platform)) {
+			return;
+		}
 		await this.ensureAdbServerStarted();
 		await this.checkForDevices();
 	}

test/unit-tests/mobile/android-device-discovery.ts

@@ -40,6 +40,11 @@ function createTestInjector(): IInjector {
 	injector.register("errors", {});
 	injector.register("logger", {});
 	injector.register("androidDebugBridgeResultHandler", AndroidDebugBridgeResultHandler);
+	injector.register("mobileHelper", {
+		isAndroidPlatform: () => {
+			return true;
+		}
+	});
 	injector.register("childProcess", {
 		spawn: (command: string, args?: string[], options?: any) => {
 			mockChildProcess = new MockEventEmitter();