Fix TouchlessNavigationRecorderTest

The test was launching the NTP from the wrong thread.

Change-Id: I99f72187c2ce8d129ed388f7f712795c95aa364e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1752553
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Reviewed-by: Mehran Mahmoudi <mahmoudi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#686532}

chrome/android/touchless/javatests/src/org/chromium/chrome/browser/touchless/TouchlessNavigationRecorderTest.java

@@ -85,8 +85,10 @@ public class TouchlessNavigationRecorderTest {
 
         ChromeTabUtils.waitForTabPageLoaded(mInitialTab, (String) null);
 
-        // This will trigger an intent and use PageTransition.FROM_API.
-        mActivityTestRule.getActivity().getTabCreator(false).launchNTP();
+        TestThreadUtils.runOnUiThreadBlocking(() -> {
+            // This will trigger an intent and use PageTransition.FROM_API.
+            mActivityTestRule.getActivity().getTabCreator(false).launchNTP();
+        });
         callback.waitForCallback(0);
     }