Add CDM dependency in Tethering

This change introduces a limited library for dependencies on
framework-connectivity from Tethering,
connectivity-internal-api-util, where all classes are annotated with
@RequiresApi(S) to ensure proper API checks are done before usage.

Bug: 245972418

Change-Id: I82bafd9063341adc71d07f0858e6d68283d081f0
diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 829e66a..d2f6d15 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -34,6 +34,7 @@
     // Libraries not including Tethering's own framework-tethering (different flavors of that one
     // are needed depending on the build rule)
     libs: [
+        "connectivity-internal-api-util",
         "framework-configinfrastructure",
         "framework-connectivity.stubs.module_lib",
         "framework-connectivity-t.stubs.module_lib",
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index e59c8e4..8840394 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -199,6 +199,7 @@
             "android.net.connectivity",
             "android.net.netstats.provider",
             "android.net.nsd",
+            "android.net.wear",
         ],
     },
 }
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index 9ca3f14..481557b 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -22,6 +22,10 @@
     defaults: ["framework-module-defaults"],
     impl_library_visibility: [
         "//packages/modules/Connectivity/Tethering:__subpackages__",
+        "//packages/modules/Connectivity/framework",
+        "//packages/modules/Connectivity/framework-t",
+        "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/service-t",
 
         // Using for test only
         "//cts/tests/netlegacy22.api",
@@ -64,19 +68,8 @@
 filegroup {
     name: "framework-tethering-srcs",
     srcs: [
-        "src/android/net/TetheredClient.aidl",
-        "src/android/net/TetheredClient.java",
-        "src/android/net/TetheringManager.java",
-        "src/android/net/TetheringConstants.java",
-        "src/android/net/IIntResultListener.aidl",
-        "src/android/net/ITetheringEventCallback.aidl",
-        "src/android/net/ITetheringConnector.aidl",
-        "src/android/net/TetheringCallbackStartedParcel.aidl",
-        "src/android/net/TetheringConfigurationParcel.aidl",
-        "src/android/net/TetheringRequestParcel.aidl",
-        "src/android/net/TetherStatesParcel.aidl",
-        "src/android/net/TetheringInterface.aidl",
-        "src/android/net/TetheringInterface.java",
+        "src/**/*.aidl",
+        "src/**/*.java",
     ],
     path: "src"
 }
diff --git a/Tethering/common/TetheringLib/src/android/net/wear/ICompanionDeviceManagerProxy.aidl b/Tethering/common/TetheringLib/src/android/net/wear/ICompanionDeviceManagerProxy.aidl
new file mode 100644
index 0000000..f8c39bf
--- /dev/null
+++ b/Tethering/common/TetheringLib/src/android/net/wear/ICompanionDeviceManagerProxy.aidl
@@ -0,0 +1,24 @@
+/*
+ * 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 android.net.wear;
+
+import android.companion.AssociationInfo;
+
+/** @hide */
+interface ICompanionDeviceManagerProxy {
+    List<AssociationInfo> getAllAssociations();
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/wear/CompanionDeviceManagerProxy.java b/Tethering/src/com/android/networkstack/tethering/wear/CompanionDeviceManagerProxy.java
new file mode 100644
index 0000000..e94febb
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/wear/CompanionDeviceManagerProxy.java
@@ -0,0 +1,55 @@
+/*
+ * 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 com.android.networkstack.tethering.wear;
+
+import android.companion.AssociationInfo;
+import android.companion.CompanionDeviceManager;
+import android.content.Context;
+import android.net.connectivity.TiramisuConnectivityInternalApiUtil;
+import android.net.wear.ICompanionDeviceManagerProxy;
+import android.os.Build;
+import android.os.RemoteException;
+
+import androidx.annotation.RequiresApi;
+
+import java.util.List;
+
+/**
+ * A proxy for {@link android.companion.CompanionDeviceManager}, allowing Tethering to call it with
+ * a different set of permissions.
+ * @hide
+ */
+public class CompanionDeviceManagerProxy {
+    private final ICompanionDeviceManagerProxy mService;
+
+    @RequiresApi(Build.VERSION_CODES.TIRAMISU)
+    public CompanionDeviceManagerProxy(Context context) {
+        mService = ICompanionDeviceManagerProxy.Stub.asInterface(
+                TiramisuConnectivityInternalApiUtil.getCompanionDeviceManagerProxyService(context));
+    }
+
+    /**
+     * @see CompanionDeviceManager#getAllAssociations()
+     */
+    public List<AssociationInfo> getAllAssociations() {
+        try {
+            return mService.getAllAssociations();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+}