Add talkback feedback when setting passowrd/pin/pattern complete

Bug: 297959385
Test: 1. Enable talkback
      2. Change or Set a password/pattern/pin
      3. Check if there is a feedback after setting complete
Change-Id: I9a63bc99575e27b504dd3130e416f65dac068b4e

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

@@ -1084,6 +1084,12 @@ public class ChooseLockPassword extends SettingsActivity {
                     startActivity(intent);
                 }
             }
+
+            if (mLayout != null) {
+                mLayout.announceForAccessibility(
+                        getString(R.string.accessibility_setup_password_complete));
+            }
+
             getActivity().finish();
         }