Fix #dismissButtonNotShownOnResetForChildAccount on automotive

Fix
FirstRunActivitySigninAndSyncTest#dismissButtonNotShownOnResetForChildAccount on automotive devices by:
 - Scroll to signin_fre_continue_button before clicking it
 - Compete device lock screen on auto
 - Replace Espress back press with directly invoking
   FirstRunActivity#handleBackPress since AAOS doesn't have a back
   button

Bug: 1453805
Change-Id: I680988ac84a4cebff92e7427d7e5f846bcaa5c06
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4609144
Reviewed-by: Charles Hager <clhager@google.com>
Reviewed-by: Theresa Sullivan <twellington@chromium.org>
Auto-Submit: Theresa Sullivan <twellington@chromium.org>
Commit-Queue: Theresa Sullivan <twellington@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1156607}

chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunActivitySigninAndSyncTest.java

@@ -6,6 +6,7 @@
 
 import static androidx.test.espresso.Espresso.onView;
 import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.action.ViewActions.scrollTo;
 import static androidx.test.espresso.assertion.ViewAssertions.matches;
 import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
 import static androidx.test.espresso.matcher.ViewMatchers.isEnabled;
@@ -28,7 +29,6 @@
 import android.widget.TextView;
 
 import androidx.annotation.IdRes;
-import androidx.test.espresso.Espresso;
 import androidx.test.espresso.UiController;
 import androidx.test.espresso.ViewAction;
 import androidx.test.espresso.matcher.ViewMatchers.Visibility;
@@ -76,6 +76,8 @@
 import org.chromium.content_public.browser.test.util.TestThreadUtils;
 import org.chromium.ui.test.util.DeviceRestriction;
 
+import java.util.concurrent.ExecutionException;
+
 /**
  * Integration tests for the first run experience with sign-in and sync decoupled.
  */
@@ -198,14 +200,15 @@ public void continueButtonClickShowsSyncConsentPageWithChildAccount() {
     // ChildAccountStatusSupplier uses AppRestrictions to quickly detect non-supervised cases,
     // adding at least one policy via AppRestrictions prevents that.
     @Policies.Add(@Policies.Item(key = "ForceSafeSearch", string = "true"))
-    public void dismissButtonNotShownOnResetForChildAccount() {
+    public void dismissButtonNotShownOnResetForChildAccount() throws ExecutionException {
         mAccountManagerTestRule.addAccount(CHILD_EMAIL);
         launchFirstRunActivityAndWaitForNativeInitialization();
         waitUntilCurrentPageIs(SigninFirstRunFragment.class);
         onView((withId(R.id.signin_fre_dismiss_button))).check(matches(not(isDisplayed())));
 
-        onView((withId(R.id.signin_fre_continue_button))).perform(click());
-        Espresso.pressBack();
+        onView((withId(R.id.signin_fre_continue_button))).perform(scrollTo(), click());
+        completeAutoDeviceLockIfNeeded();
+        TestThreadUtils.runOnUiThreadBlocking(() -> mFirstRunActivity.handleBackPress());
 
         onView((withId(R.id.signin_fre_dismiss_button))).check(matches(not(isDisplayed())));
     }