FaceEnrollIntro requires scroll for accessibility

Test: Turn talkback on, verified that scrolling moves the talkback
cursor to the next text items.
Fixes: 336963233

Change-Id: Ia9f24ee658df96647fe953e84119d20270200011
diff --git a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
index d776b9a..2628de0 100644
--- a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
+++ b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
@@ -38,6 +38,7 @@
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.ScrollView;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -160,6 +161,10 @@
         inControlMessage.setMovementMethod(LinkMovementMethod.getInstance());
         lessSecure.setText(getLessSecureMessage());
 
+        final ScrollView scrollView =
+                findViewById(com.google.android.setupdesign.R.id.sud_scroll_view);
+        scrollView.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
+
         // Set up and show the "require eyes" info section if necessary.
         if (getResources().getBoolean(R.bool.config_face_intro_show_require_eyes)) {
             final LinearLayout infoRowRequireEyes = findViewById(R.id.info_row_require_eyes);