ov-components: update selector for local video element in room tests

Author: CSantosM

openvidu-components-angular/openvidu-demo-app/frontend/e2e/room.test.ts

@@ -214,15 +214,15 @@ describe('Testing Room', () => {
 
 		await utils.checkToolbarIsPresent();
 
-		let localVideo = await utils.waitForElement('.OV_video-element');
+		let localVideo = await utils.waitForElement('.local_participant');
 
 		await saveScreenshot('before.png', localVideo);
 
 		// check if the virtual background is applied
 
 		await utils.applyVirtualBackground('2');
 
-		localVideo = await utils.waitForElement('.OV_video-element');
+		localVideo = await utils.waitForElement('.local_participant');
 		await saveScreenshot('after.png', localVideo);
 
 		const img1 = PNG.sync.read(fs.readFileSync('before.png'));