Changed my mind. Keep operation timeout at 30s for now.

Author: Michael Lehenbauer

firebase-firestore/src/androidTest/java/com/google/firebase/firestore/testutil/IntegrationTestUtil.java

@@ -64,7 +64,7 @@ public class IntegrationTestUtil {
   private static final Map<FirebaseFirestore, Boolean> firestoreStatus = new HashMap<>();
 
   /** Default amount of time to wait for a given operation to complete, used by waitFor() helper. */
-  static final long OPERATION_WAIT_TIMEOUT_MS = 10000;
+  static final long OPERATION_WAIT_TIMEOUT_MS = 30000;
 
   /**
    * Firestore databases can be subject to a ~30s "cold start" delay if they have not been used