DO NOT MERGE: Remove usage of deprecated toolbar method

Bug: 158867330
Test: Presubmits
Change-Id: Ia568f91454275ad7ff9cff50df8e068a13ffda26
diff --git a/src/com/android/car/systemupdater/UpdateLayoutFragment.java b/src/com/android/car/systemupdater/UpdateLayoutFragment.java
index 4339845..ff56371 100644
--- a/src/com/android/car/systemupdater/UpdateLayoutFragment.java
+++ b/src/com/android/car/systemupdater/UpdateLayoutFragment.java
@@ -219,7 +219,7 @@
 
         @Override
         protected void onPostExecute(UpdateParser.ParsedUpdate result) {
-            mToolbar.hideProgressBar();
+            mProgressBar.setVisible(false);
             if (result == null) {
                 showStatus(R.string.verify_failure);
                 return;