Migrate to new overlay-stopping flag

Bug: 62196835
Test: Started an accessibility service that displays an app
overlay and verified that it disappears when approving an
accessibility service's capabilities.

Change-Id: I7c8d8b4143a5dd1cb684c31c4503608c8d5be0e3
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index ff158d5..b848ef9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -83,6 +83,7 @@
     <uses-permission android:name="android.permission.MANAGE_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.DELETE_PACKAGES"/>
     <uses-permission android:name="android.permission.MANAGE_APP_OPS_RESTRICTIONS"/>
+    <uses-permission android:name="android.permission.HIDE_NON_SYSTEM_OVERLAY_WINDOWS"/>
 
     <application android:label="@string/settings_label"
             android:icon="@drawable/ic_launcher_settings"