Add empty L2capNetworkProvider

The network provider is registered when BLE is supported.

Bug: 372936361
Test: L2capNetworkProviderTest
Change-Id: I8163339015f4a3bb0ff8911f6f52a38ec1730f39
diff --git a/service/src/com/android/server/L2capNetworkProvider.java b/service/src/com/android/server/L2capNetworkProvider.java
new file mode 100644
index 0000000..694a1df
--- /dev/null
+++ b/service/src/com/android/server/L2capNetworkProvider.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2024 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.server;
+
+import static android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkProvider;
+import android.os.Handler;
+import android.os.Looper;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+
+public class L2capNetworkProvider {
+    private static final String TAG = L2capNetworkProvider.class.getSimpleName();
+    private final Dependencies mDeps;
+    private final Handler mHandler;
+    private final NetworkProvider mProvider;
+    private final boolean mIsSupported;
+
+    @VisibleForTesting
+    public static class Dependencies {
+        /** Get NetworkProvider */
+        public NetworkProvider getNetworkProvider(Context context, Looper looper) {
+            return new NetworkProvider(context, looper, TAG);
+        }
+    }
+
+    public L2capNetworkProvider(Context context, Handler handler) {
+        this(new Dependencies(), context, handler);
+    }
+
+    @VisibleForTesting
+    public L2capNetworkProvider(Dependencies deps, Context context, Handler handler) {
+        mDeps = deps;
+        mHandler = handler;
+        mProvider = mDeps.getNetworkProvider(context, handler.getLooper());
+
+        mIsSupported = context.getPackageManager().hasSystemFeature(FEATURE_BLUETOOTH_LE);
+        if (mIsSupported) {
+            context.getSystemService(ConnectivityManager.class).registerNetworkProvider(mProvider);
+        }
+    }
+
+}
+
diff --git a/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt b/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt
new file mode 100644
index 0000000..fc0b815
--- /dev/null
+++ b/tests/unit/java/com/android/server/L2capNetworkProviderTest.kt
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2024 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.server
+
+import android.content.Context
+import android.content.pm.PackageManager
+import android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE
+import android.net.ConnectivityManager
+import android.net.NetworkProvider
+import android.os.Build
+import android.os.Handler
+import android.os.HandlerThread
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.any
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mock
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+const val TAG = "L2capNetworkProviderTest"
+
+@RunWith(DevSdkIgnoreRunner::class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+class L2capNetworkProviderTest {
+    @Mock private lateinit var context: Context
+    @Mock private lateinit var deps: L2capNetworkProvider.Dependencies
+    @Mock private lateinit var provider: NetworkProvider
+    @Mock private lateinit var cm: ConnectivityManager
+    @Mock private lateinit var pm: PackageManager
+
+    private val handlerThread = HandlerThread("$TAG handler thread").apply { start() }
+    private val handler = Handler(handlerThread.looper)
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        doReturn(provider).`when`(deps).getNetworkProvider(any(), any())
+        doReturn(cm).`when`(context).getSystemService(eq(ConnectivityManager::class.java))
+        doReturn(pm).`when`(context).getPackageManager()
+        doReturn(true).`when`(pm).hasSystemFeature(FEATURE_BLUETOOTH_LE)
+    }
+
+    @After
+    fun tearDown() {
+        handlerThread.quitSafely()
+        handlerThread.join()
+    }
+
+    @Test
+    fun testNetworkProvider_registeredWhenSupported() {
+        L2capNetworkProvider(deps, context, handler)
+        verify(cm).registerNetworkProvider(eq(provider))
+    }
+
+    @Test
+    fun testNetworkProvider_notRegisteredWhenNotSupported() {
+        doReturn(false).`when`(pm).hasSystemFeature(FEATURE_BLUETOOTH_LE)
+        L2capNetworkProvider(deps, context, handler)
+        verify(cm, never()).registerNetworkProvider(eq(provider))
+    }
+}