CMSDK: Create Quick Settings Tile API.

Create a simple CustomTile object with builder which lets a 3rd party
  application publish a quick settings tile to the status bar panel.

  An example CustomTile build:

      CustomTile customTile = new CustomTile.Builder(mContext)
             .setLabel("custom label")
             .setContentDescription("custom description")
             .setOnClickIntent(pendingIntent)
             .setOnClickUri(Uri.parse("custom uri"))
             .setIcon(R.drawable.ic_launcher)
             .build();

  Which can be published to the status bar panel via CMStatusBarManager#publishTile.

  The CustomTile contains a click intent and click uri which can be
  sent or broadcasted when the CustomQSTile's handleClick is fired.

  This implementation closely mirrors that of NotificationManager#notify for
  notifications. In that each CMStatusBarManager#publishTile can have an appended
  id which can be kept by the 3rd party application to either update the tile with,
  or to remove the tile via CMStatusBarManager#removeTile.

Change-Id: I4b8a50e4e53ef2ececc9c7fc9c8d0ec6acfd0c0e

src/java/cyanogenmod/app/CMContextConstants.java

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) 2015, The CyanogenMod 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 cyanogenmod.app;
+
+/**
+ * Constants to be used with {@link android.content.Context#getSystemService}
+ * to retrieve published system services
+ */
+public class CMContextConstants {
+
+    /**
+     * @hide
+     */
+    private CMContextConstants() {
+        // Empty constructor
+    }
+
+    /**
+     * Use with {@link android.content.Context#getSystemService} to retrieve a
+     * {@link cyanogenmod.app.CMStatusBarManager} for informing the user of
+     * background events.
+     *
+     * @see android.content.Context#getSystemService
+     * @see cyanogenmod.app.CMStatusBarManager
+     */
+    public static final String CM_STATUS_BAR_SERVICE = "cmstatusbar";
+
+}