Fix workflow options equality (#1868)

Author: Quinn-With-Two-Ns

temporal-sdk/src/main/java/io/temporal/worker/WorkerOptions.java

@@ -579,7 +579,7 @@ && compare(that.maxTaskQueueActivitiesPerSecond, maxTaskQueueActivitiesPerSecond
         && Objects.equals(stickyQueueScheduleToStartTimeout, that.stickyQueueScheduleToStartTimeout)
         && disableEagerExecution == that.disableEagerExecution
         && useBuildIdForVersioning == that.useBuildIdForVersioning
-        && buildId.equals(that.buildId);
+        && Objects.equals(that.buildId, buildId);
   }
 
   @Override

temporal-sdk/src/test/java/io/temporal/worker/WorkerOptionsTest.java

@@ -40,4 +40,11 @@ private void verifyBuild(WorkerOptions options) {
     assertEquals(10, options.getMaxConcurrentActivityExecutionSize());
     assertEquals(11, options.getMaxConcurrentLocalActivityExecutionSize());
   }
+
+  @Test
+  public void verifyWorkerOptionsEquality() {
+    WorkerOptions w1 = WorkerOptions.newBuilder().build();
+    WorkerOptions w2 = WorkerOptions.newBuilder().build();
+    assertEquals(w1, w2);
+  }
 }