Fixed Pattern SUW a11y bug

Test: Verified that setting up a patter nduring SUW no longer announces
a long peice of text after clearing the pattern.
Fixes: 386859835
Flag: EXEMPT bugfix

Change-Id: I7350aba7d3f0665f204758241af02eeaad8cc1d5

src/com/android/settings/password/ChooseLockPattern.java

@@ -815,8 +815,6 @@ public class ChooseLockPattern extends SettingsActivity {
                 if (stage == Stage.NeedToConfirm) {
                     // If the Stage is NeedToConfirm, move the a11y focus to the header.
                     mHeaderText.requestAccessibilityFocus();
-                } else {
-                    mHeaderText.announceForAccessibility(mHeaderText.getText());
                 }
             }
         }