Update firebase-common/src/main/java/com/google/firebase/emulators/FirebaseEmulator.java

Co-authored-by: Vladimir Kryachko <[email protected]>

Author: samtstern

firebase-common/src/main/java/com/google/firebase/emulators/FirebaseEmulator.java

@@ -26,7 +26,7 @@
  * @see EmulatedServiceSettings
  * @hide
  */
-public class FirebaseEmulator {
+public final class FirebaseEmulator {
 
   public final String name;