Makes WebAPK handle NOTIFICATION_PREFERENCES intents

chrome/android/webapk/shell_apk/AndroidManifest.xml

Index: chrome/android/webapk/shell_apk/AndroidManifest.xml
diff --git a/chrome/android/webapk/shell_apk/AndroidManifest.xml b/chrome/android/webapk/shell_apk/AndroidManifest.xml
index 14e2062a22b78c210471d1e2f8aefc7b187fed90..86bdbe169f2b92d1ee3d4bc2e4e65e97046a1fa3 100644
--- a/chrome/android/webapk/shell_apk/AndroidManifest.xml
+++ b/chrome/android/webapk/shell_apk/AndroidManifest.xml
@@ -30,6 +30,12 @@
                 <data android:scheme="https" android:host="{{ scope_url_host }}" android:pathPrefix="/"></data>
             </intent-filter>
         </activity>
+        <activity android:name="org.chromium.webapk.shell_apk.NotificationSettingsLauncherActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.NOTIFICATION_PREFERENCES"/>
+            </intent-filter>
+        </activity>
         <meta-data android:name="runtimeHost" android:value="{{ runtime_host }}" />
         <meta-data android:name="startUrl" android:value="{{ start_url }}" />
         <meta-data android:name="name" android:value="{{ name }}" />