switch to ==

Author: msridhar

nullaway/src/main/java/com/uber/nullaway/generics/TypeSubstitutionUtils.java

@@ -294,7 +294,7 @@ public Type visitMethodType(Type.MethodType t, Type other) {
     @Override
     public Type visitClassType(Type.ClassType t, Type other) {
       if (other instanceof Type.WildcardType wt) {
-        if (wt.kind.equals(BoundKind.EXTENDS)) {
+        if (wt.kind == BoundKind.EXTENDS) {
           // As a temporary measure, we restore nullability annotations from the upper bound of the
           // wildcard.
           // TODO revisit this decision when we add fuller support for inference and wildcards.