Add multi-device tests for CDM.

# Bug component: 708992

evanxinchen@google.com

guojing@google.com

jeremyns@google.com

raphk@google.com

yukl@google.com

## CDM Multi-device Tests

### Device Setup

To test on physical devices, connect _two_ devices locally and enable USB debugging setting on both devices.

When running on a cloudtop or other remote setups, use pontis to connect the devices on remote set up by running `pontis start`.

Verify that pontis client is connected via `pontis status` and confirm that both devices are in "connected" state via `adb devices`.

See go/pontis for more details regarding this workflow.

To test on virtual devices, follow instructions to [set up netsim on cuttlefish](https://g3doc.corp.google.com/ambient/d2di/sim/g3doc/guide/cuttlefish.md?cl=head).

Launch _two_ instances of virtual devices by specifying `--num_instances=2` parameter.

### Running the Test

```

atest CompanionDeviceManagerMultiDeviceTestCases

```

// Copyright (C) 2022 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 {

    // See: http://go/android-license-faq

    // A large-scale-change added 'default_applicable_licenses' to import

    // all of the 'license_kinds' from "frameworks_base_license"

    // to get the below license kinds:

    //   SPDX-license-identifier-Apache-2.0

    default_applicable_licenses: ["frameworks_base_license"],

}

android_test {

    name: "cdm_snippet",

    srcs: ["src/**/*.kt"],

    manifest: "AndroidManifest.xml",

    platform_apis: true,

    target_sdk_version: "current",

    static_libs: [

        "androidx.test.ext.junit",

        "androidx.test.uiautomator_uiautomator",

        "compatibility-device-util-axt",

        "cts-companion-common",

        "cts-companion-uicommon",

        "kotlin-stdlib",

        "mobly-snippet-lib",

    ],

    libs: [

        "android.test.base",

        "android.test.runner",

    ],

    optimize: {

        proguard_compatibility: true,

        proguard_flags_files: ["proguard.flags"],

    },

}

<?xml version="1.0" encoding="utf-8"?>

<!--

  ~ Copyright (C) 2022 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="android.companion.multidevices">

  <uses-permission android:name="android.permission.INTERNET" />

  <uses-permission android:name="android.permission.REQUEST_COMPANION_SELF_MANAGED" />

  <uses-permission android:name="android.permission.REQUEST_OBSERVE_COMPANION_DEVICE_PRESENCE" />

  <uses-permission android:name="android.permission.REQUEST_COMPANION_PROFILE_WATCH" />

  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

  <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />

  <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

  <uses-permission android:name="android.permission.DELIVER_COMPANION_MESSAGES" />

  <uses-feature android:name="android.hardware.bluetooth" android:required="true"/>

  <uses-feature android:name="android.software.companion_device_setup" />

  <application>

    <!-- Add any classes that implement the Snippet interface as meta-data, whose

         value is a comma-separated string, each section being the package path

         of a snippet class -->

    <meta-data

        android:name="mobly-snippets"

        android:value="android.companion.multidevices.CompanionDeviceManagerSnippet" />

  </application>

  <!-- Add an instrumentation tag so that the app can be launched through an

       instrument command. The runner `com.google.android.mobly.snippet.SnippetRunner`

       is derived from `AndroidJUnitRunner`, and is required to use the

       Mobly Snippet Lib. -->

  <instrumentation

      android:name="com.google.android.mobly.snippet.SnippetRunner"

      android:targetPackage="android.companion.multidevices" />

</manifest>

# Keep all companion classes.

-keep class android.companion.** {

    *;

}

# Do not touch Mobly.

-keep class com.google.android.mobly.** {

    *;

}

# Keep names for easy debugging.

-dontobfuscate

# Necessary to allow debugging.

-keepattributes *

# By default, proguard leaves all classes in their original package, which

# needlessly repeats com.google.android.apps.etc.

-repackageclasses ""

# Allows proguard to make private and protected methods and fields public as

# part of optimization. This lets proguard inline trivial getter/setter

# methods.

-allowaccessmodification

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