Allow external packages to open the RedactionInsterstitial.

Introduce RedactionSettingsStandalone, to supply the private setup
required by RedactionInsterstitial.

Bug: 15934899
Change-Id: Ie0bcc207c4f331def207e588bbad36b8986fe114

AndroidManifest.xml

@@ -1119,6 +1119,14 @@
 
         <activity android:name=".notification.RedactionInterstitial"/>
 
+        <activity android:name=".notification.RedactionSettingsStandalone"
+                  android:exported="true">
+            <intent-filter>
+                <action android:name="android.settings.ACTION_APP_NOTIFICATION_REDACTION" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <activity android:name="ConfirmLockPattern"/>
 
         <activity android:name="ConfirmLockPassword"

src/com/android/settings/notification/RedactionSettingsStandalone.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.notification;
+
+import com.android.settings.R;
+
+import android.content.Intent;
+import com.android.settings.SettingsActivity;
+import com.android.settings.notification.RedactionInterstitial.RedactionInterstitialFragment;
+
+/** Wrapper to allow external activites to jump directly to the {@link RedactionInterstitial} */
+public class RedactionSettingsStandalone extends SettingsActivity {
+
+    @Override
+    public Intent getIntent() {
+        Intent modIntent = new Intent(super.getIntent());
+        modIntent.putExtra(EXTRA_SHOW_FRAGMENT, RedactionInterstitialFragment.class.getName())
+                .putExtra(EXTRA_PREFS_SHOW_BUTTON_BAR, true)
+                .putExtra(EXTRA_PREFS_SET_BACK_TEXT, (String) null)
+                .putExtra(EXTRA_PREFS_SET_NEXT_TEXT, getString(
+                        R.string.app_notifications_dialog_done));
+        return modIntent;
+    }
+
+    @Override
+    protected boolean isValidFragment(String fragmentName) {
+        return RedactionInterstitialFragment.class.getName().equals(fragmentName);
+    }
+}