Added CTS tests for RESTRICT_BACKGROUND_CHANGED.

These tests require a second app (besides the test app) that defines a
service; the host-side test then launches the service whose only purpose
is to define a broadcast receiver, which in turn will count the number
of intents received in a shared preferences file. Then the test app will
read the shared preferences and assert the proper number of intents have
been received.

BUG: 26451391
Change-Id: I4c5d5e57c09a0bd57a7f6581820cc9115318dd47
diff --git a/tests/cts/hostside/app2/Android.mk b/tests/cts/hostside/app2/Android.mk
new file mode 100644
index 0000000..e330bf7
--- /dev/null
+++ b/tests/cts/hostside/app2/Android.mk
@@ -0,0 +1,31 @@
+#
+# 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.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := tests
+LOCAL_SDK_VERSION := current
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := CtsHostsideNetworkTestsApp2
+
+LOCAL_PROGUARD_ENABLED := disabled
+LOCAL_DEX_PREOPT := false
+
+include $(BUILD_CTS_SUPPORT_PACKAGE)
diff --git a/tests/cts/hostside/app2/AndroidManifest.xml b/tests/cts/hostside/app2/AndroidManifest.xml
new file mode 100644
index 0000000..d69bf56
--- /dev/null
+++ b/tests/cts/hostside/app2/AndroidManifest.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.cts.net.hostside.app2"
+    android:sharedUserId="com.android.cts.net.hostside.apps" >
+
+    <!-- This application is used to listen to RESTRICT_BACKGROUND_CHANGED intents and store
+         them in a shared preferences which is then read by the test app.
+         It defines 2 listeners, one in the manifest and another dynamically registered by
+         a service.
+    -->
+    <application>
+        <service android:name=".MyService" />
+
+        <receiver android:name=".MyBroadcastReceiver" >
+            <intent-filter>
+                <action android:name="android.net.conn.RESTRICT_BACKGROUND_CHANGED" />
+            </intent-filter>
+        </receiver>
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/Common.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/Common.java
new file mode 100644
index 0000000..91caeda
--- /dev/null
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/Common.java
@@ -0,0 +1,23 @@
+/*
+ * 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.android.cts.net.hostside.app2;
+
+public final class Common {
+
+    static final String TAG = "CtsNetApp2";
+    static final String MANIFEST_RECEIVER = "ManifestReceiver";
+    static final String DYNAMIC_RECEIVER = "DynamicReceiver";
+}
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
new file mode 100644
index 0000000..0cbf360
--- /dev/null
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
@@ -0,0 +1,51 @@
+/*
+ * 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.android.cts.net.hostside.app2;
+
+import static com.android.cts.net.hostside.app2.Common.MANIFEST_RECEIVER;
+import static com.android.cts.net.hostside.app2.Common.TAG;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.util.Log;
+
+/**
+ * Receiver that stores received broadcasts in a shared preference.
+ */
+public class MyBroadcastReceiver extends BroadcastReceiver {
+
+    private final String mName;
+
+    public MyBroadcastReceiver() {
+        this(MANIFEST_RECEIVER);
+    }
+
+    MyBroadcastReceiver(String name) {
+        Log.d(TAG, "Constructing MyBroadcastReceiver named " + name);
+        mName = name;
+   }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        Log.d(TAG, "onReceive() for " + mName + ": " + intent);
+        final SharedPreferences prefs = context.getSharedPreferences(mName, Context.MODE_PRIVATE);
+        final String pref = intent.getAction();
+        final int value = prefs.getInt(pref, 0) + 1;
+        Log.d(TAG, "Setting " + pref + " = " + value);
+        prefs.edit().putInt(pref, value).apply();
+    }
+}
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java
new file mode 100644
index 0000000..882bb62
--- /dev/null
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java
@@ -0,0 +1,44 @@
+/*
+ * 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.android.cts.net.hostside.app2;
+
+import static android.net.ConnectivityManager.ACTION_RESTRICT_BACKGROUND_CHANGED;
+import static com.android.cts.net.hostside.app2.Common.DYNAMIC_RECEIVER;
+import static com.android.cts.net.hostside.app2.Common.TAG;
+import android.app.Service;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.IBinder;
+import android.util.Log;
+
+/**
+ * Service used to dynamically register a broadcast receiver.
+ */
+public class MyService extends Service {
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Log.d(TAG, "onStartCommand: " + intent);
+        getApplicationContext().registerReceiver(new MyBroadcastReceiver(DYNAMIC_RECEIVER),
+                new IntentFilter(ACTION_RESTRICT_BACKGROUND_CHANGED));
+        return START_STICKY;
+    }
+}