Add emulator-launcher.

src/input-validator.ts

@@ -28,3 +28,9 @@ export function checkHeadless(headless: string): void {
     throw new Error(`Input for input.headless should be either 'true' or 'false'.`);
   }
 }
+
+export function checkDisableAnimations(disableAnimations: string): void {
+  if (disableAnimations !== 'true' && disableAnimations !== 'false') {
+    throw new Error(`Input for input.disable-animations should be either 'true' or 'false'.`);
+  }
+}