Review feedback

Author: rsgowman

firebase-firestore/src/main/java/com/google/firebase/firestore/DocumentReference.java

@@ -525,12 +525,11 @@ private ListenerRegistration addSnapshotListenerInternal(
   }
 
   @Override
-  @SuppressWarnings("EqualsGetClass") // This class is effectively final.
   public boolean equals(Object o) {
     if (this == o) {
       return true;
     }
-    if (o == null || getClass() != o.getClass()) {
+    if (!(o instanceof DocumentReference)) {
       return false;
     }
 

firebase-firestore/src/main/java/com/google/firebase/firestore/Query.java

@@ -892,12 +892,11 @@ private ListenerRegistration addSnapshotListenerInternal(
   }
 
   @Override
-  @SuppressWarnings("EqualsGetClass") // This class is effectively final.
   public boolean equals(Object o) {
     if (this == o) {
       return true;
     }
-    if (o == null || getClass() != o.getClass()) {
+    if (!(o instanceof Query)) {
       return false;
     }