Update PermissionPolicyTest

.. to remove preinstalled from SYSTEM_ALERT_WINDOW

Bug: 159616727
Bug: 171177581
Test: atest PermissionPolicyTest
Change-Id: Id027f1cb6c5027dc15d765f47e83b263349dd26e
diff --git a/tests/tests/permission2/res/raw/android_manifest.xml b/tests/tests/permission2/res/raw/android_manifest.xml
index 26e568e..c006490 100644
--- a/tests/tests/permission2/res/raw/android_manifest.xml
+++ b/tests/tests/permission2/res/raw/android_manifest.xml
@@ -2672,11 +2672,11 @@
          The app can check whether it has this authorization by calling
          {@link android.provider.Settings#canDrawOverlays
          Settings.canDrawOverlays()}.
-         <p>Protection level: signature|preinstalled|appop|pre23|development -->
+         <p>Protection level: signature|appop|installer|pre23|development -->
     <permission android:name="android.permission.SYSTEM_ALERT_WINDOW"
         android:label="@string/permlab_systemAlertWindow"
         android:description="@string/permdesc_systemAlertWindow"
-        android:protectionLevel="signature|preinstalled|appop|pre23|development" />
+        android:protectionLevel="signature|appop|installer|pre23|development" />
 
     <!-- @deprecated Use {@link android.Manifest.permission#REQUEST_COMPANION_RUN_IN_BACKGROUND}
          @hide