API for notification listener for Companioon apps

Test: 1. Trigger the confitrmation dialog.
Ensure it looks exactly like the one from settings.
2. Call an API without associating the appa first
Ensure exception is thrown with a message mentioning the need to associate 1st
Change-Id: I94d4116e1988db869ed445ae3fd018c50590e3f4
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 000c8c4..8869593 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -3556,6 +3556,11 @@
                 android:process=":ui">
         </activity>
 
+        <activity android:name="com.android.settings.notification.NotificationAccessConfirmationActivity"
+                  android:theme="@android:style/Theme.DeviceDefault.Light.Dialog.Alert"
+                  android:excludeFromRecents="true">
+        </activity>
+
         <receiver android:name="com.android.server.BootReceiver"
                 android:systemUserOnly="true">
             <intent-filter android:priority="1000">