Merge "TalkBack doesn't announce the status messages in the "Set a pattern" flow in SUW" into main

import android.view.View;

import android.view.ViewGroup;

import android.view.WindowManager;

import android.view.accessibility.AccessibilityEvent;

import android.widget.TextView;

import androidx.fragment.app.Fragment;

            // the rest of the stuff varies enough that it is easier just to handle

            // on a case by case basis.

            mLockPatternView.setDisplayMode(DisplayMode.Correct);

            boolean announceAlways = false;

            switch (mUiStage) {

                case Introduction:

                case ConfirmWrong:

                    mLockPatternView.setDisplayMode(DisplayMode.Wrong);

                    postClearPatternRunnable();

                    announceAlways = true;

                    break;

                case FirstChoiceValid:

                    break;

                    break;

            }

            // If the stage changed, announce the header for accessibility. This

            // is a no-op when accessibility is disabled.

            if (previousStage != stage || announceAlways) {

                if (stage == Stage.NeedToConfirm) {

                    // If the Stage is NeedToConfirm, move the a11y focus to the header.

                    mHeaderText.requestAccessibilityFocus();

                }

            }

            mHeaderText.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);

        }

        protected void updateFooterLeftButton(Stage stage) {