[LE Audio] Broadcast Sink UI

- Add dialog for Broadcast and find broadcast source

 - Add Activity for find broadcast source

Bug: 228274114
Test: Manual test
Change-Id: I830efc3514fc42aaa4e53f491ed3a7459bd9bb41

src/com/android/settings/bluetooth/BluetoothFindBroadcastsFragment.java

@@ -0,0 +1,128 @@
+/*
+ * 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.settings.bluetooth;
+
+import static android.bluetooth.BluetoothDevice.BOND_NONE;
+import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;
+
+import android.app.settings.SettingsEnums;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.settings.R;
+import com.android.settings.dashboard.RestrictedDashboardFragment;
+import com.android.settingslib.bluetooth.CachedBluetoothDevice;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This fragment allowed users to find the nearby broadcast sources.
+ */
+public class BluetoothFindBroadcastsFragment extends RestrictedDashboardFragment {
+
+    private static final String TAG = "BTFindBroadcastsFrg";
+
+    public static final String KEY_DEVICE_ADDRESS = "device_address";
+
+    public static final String PREF_KEY_BROADCAST_SOURCE = "broadcast_source";
+
+    @VisibleForTesting
+    String mDeviceAddress;
+    @VisibleForTesting
+    LocalBluetoothManager mManager;
+    @VisibleForTesting
+    CachedBluetoothDevice mCachedDevice;
+
+    public BluetoothFindBroadcastsFragment() {
+        super(DISALLOW_CONFIG_BLUETOOTH);
+    }
+
+    @VisibleForTesting
+    LocalBluetoothManager getLocalBluetoothManager(Context context) {
+        return Utils.getLocalBtManager(context);
+    }
+
+    @VisibleForTesting
+    CachedBluetoothDevice getCachedDevice(String deviceAddress) {
+        BluetoothDevice remoteDevice =
+                mManager.getBluetoothAdapter().getRemoteDevice(deviceAddress);
+        return mManager.getCachedDeviceManager().findDevice(remoteDevice);
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        mDeviceAddress = getArguments().getString(KEY_DEVICE_ADDRESS);
+        mManager = getLocalBluetoothManager(context);
+        mCachedDevice = getCachedDevice(mDeviceAddress);
+        super.onAttach(context);
+        if (mCachedDevice == null) {
+            //Close this page if device is null with invalid device mac address
+            Log.w(TAG, "onAttach() CachedDevice is null!");
+            finish();
+            return;
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        finishFragmentIfNecessary();
+    }
+
+    @VisibleForTesting
+    void finishFragmentIfNecessary() {
+        if (mCachedDevice.getBondState() == BOND_NONE) {
+            finish();
+            return;
+        }
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        //TODO(b/228255796) : add new enum for find broadcast fragment
+        return SettingsEnums.PAGE_UNKNOWN;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.bluetooth_find_broadcasts_fragment;
+    }
+
+    @Override
+    protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
+        ArrayList<AbstractPreferenceController> controllers = new ArrayList<>();
+
+        if (mCachedDevice != null) {
+            Lifecycle lifecycle = getSettingsLifecycle();
+            controllers.add(new BluetoothFindBroadcastsHeaderController(context, this,
+                    mCachedDevice, lifecycle, mManager));
+        }
+        return controllers;
+    }
+}