Use res-auto as app xml namespace instead of settings.

This is necessary for SettingsIntelligence to parse settings:keywords
when indexing search stuff.

Bug: 64938328
Test: rerun tests
Change-Id: I0d8885c854852020dfa0b9faa3044d4a1b82f8f2
diff --git a/res/xml/security_settings_pattern.xml b/res/xml/security_settings_pattern.xml
index d55d6b8..9b7482f 100644
--- a/res/xml/security_settings_pattern.xml
+++ b/res/xml/security_settings_pattern.xml
@@ -15,7 +15,7 @@
 -->
 
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
-                  xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
+                  xmlns:settings="http://schemas.android.com/apk/res-auto"
                   android:key="security_settings_pattern_screen"
                   android:title="@string/lock_settings_picker_title">