Add API demo for running multiple foreground services.

Change-Id: I44435f6e7750ccbbadf5e293dd10069c6cef94a4

samples/ApiDemos/AndroidManifest.xml

@@ -595,6 +595,7 @@
         </activity>
 
         <service android:name=".app.ForegroundService" />
+        <service android:name=".app.ForegroundService2" />
 
         <activity android:name=".app.ForegroundService$Controller"
                 android:label="@string/activity_foreground_service_controller"

samples/ApiDemos/res/layout/foreground_service_controller.xml

@@ -37,25 +37,33 @@
     <Button android:id="@+id/start_foreground_wakelock"
         android:layout_width="wrap_content" android:layout_height="wrap_content"
         android:text="@string/start_service_foreground_wakelock">
-        <requestFocus />
     </Button>
 
     <Button android:id="@+id/start_background"
         android:layout_width="wrap_content" android:layout_height="wrap_content" 
         android:text="@string/start_service_background">
-        <requestFocus />
     </Button>
 
     <Button android:id="@+id/start_background_wakelock"
         android:layout_width="wrap_content" android:layout_height="wrap_content"
         android:text="@string/start_service_background_wakelock">
-        <requestFocus />
     </Button>
 
     <Button android:id="@+id/stop"
         android:layout_width="wrap_content" android:layout_height="wrap_content" 
         android:text="@string/stop_service">
     </Button>
 
+    <Button android:id="@+id/start_foreground_2"
+            android:layout_width="wrap_content" android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/start_service_foreground_2">
+    </Button>
+
+    <Button android:id="@+id/stop_2"
+            android:layout_width="wrap_content" android:layout_height="wrap_content"
+            android:text="@string/stop_service_2">
+    </Button>
+
 </LinearLayout>
 

samples/ApiDemos/res/values/strings.xml

@@ -312,6 +312,7 @@
     <string name="start_service_foreground_wakelock">Start Service Foreground w/Wakelock</string>
     <string name="start_service_background">Start Service Background</string>
     <string name="start_service_background_wakelock">Start Service Background w/Wakelock</string>
+    <string name="start_service_foreground_2">Start Service Foreground 2</string>
 
     <string name="activity_isolated_service_controller">App/Service/Isolated Service Controller</string>
     <string name="isolated_service_controller">This demonstrates the use of android:isolatedProcess

samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java

@@ -259,6 +259,10 @@ protected void onCreate(Bundle savedInstanceState) {
             button.setOnClickListener(mBackgroundWakelockListener);
             button = (Button)findViewById(R.id.stop);
             button.setOnClickListener(mStopListener);
+            button = (Button)findViewById(R.id.start_foreground_2);
+            button.setOnClickListener(mForegroundListener2);
+            button = (Button)findViewById(R.id.stop_2);
+            button.setOnClickListener(mStopListener2);
         }
 
         private OnClickListener mForegroundListener = new OnClickListener() {
@@ -299,5 +303,21 @@ public void onClick(View v) {
                         ForegroundService.class));
             }
         };
+
+        private OnClickListener mForegroundListener2 = new OnClickListener() {
+            public void onClick(View v) {
+                Intent intent = new Intent(ForegroundService.ACTION_FOREGROUND);
+                intent.setClass(Controller.this, ForegroundService2.class);
+                startService(intent);
+            }
+        };
+
+        private OnClickListener mStopListener2 = new OnClickListener() {
+            public void onClick(View v) {
+                stopService(new Intent(Controller.this,
+                        ForegroundService2.class));
+            }
+        };
+
     }
 }

samples/ApiDemos/src/com/example/android/apis/app/ForegroundService2.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2016 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.example.android.apis.app;
+
+public class ForegroundService2 extends ForegroundService {
+}