[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/BluetoothFindBroadcastsHeaderController.java

@@ -0,0 +1,131 @@
+/*
+ * 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 android.content.Context;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settingslib.bluetooth.CachedBluetoothDevice;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+import com.android.settingslib.bluetooth.LocalBluetoothProfileManager;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.widget.LayoutPreference;
+
+/**
+ * This class adds a header to display the action button for joining the broadcast session
+ * by scanning QR code and leaving the broadcast session
+ */
+public class BluetoothFindBroadcastsHeaderController extends BluetoothDetailsController {
+    private static final String TAG = "BtFindBroadcastCtrl";
+
+    private static final String KEY_BROADCAST_HEADER = "bluetooth_find_broadcast_header";
+    private static final String KEY_BROADCAST_SOURCE_LIST = "broadcast_source_list";
+
+    LayoutPreference mLayoutPreference;
+    PreferenceCategory mBroadcastSourceList;
+    TextView mTitle;
+    TextView mSummary;
+    Button mBtnFindBroadcast;
+    LinearLayout mBtnBroadcastLayout;
+    Button mBtnLeaveBroadcast;
+    Button mBtnScanQrCode;
+
+    public BluetoothFindBroadcastsHeaderController(Context context,
+            PreferenceFragmentCompat fragment, CachedBluetoothDevice device, Lifecycle lifecycle,
+            LocalBluetoothManager bluetoothManager) {
+        super(context, fragment, device, lifecycle);
+    }
+
+    @Override
+    protected void init(PreferenceScreen screen) {
+        mLayoutPreference = screen.findPreference(KEY_BROADCAST_HEADER);
+        mBroadcastSourceList = screen.findPreference(KEY_BROADCAST_SOURCE_LIST);
+
+        refresh();
+    }
+
+    @Override
+    protected void refresh() {
+        if (mLayoutPreference == null || mCachedDevice == null) {
+            return;
+        }
+
+        mTitle = mLayoutPreference.findViewById(R.id.entity_header_title);
+        mTitle.setText(mCachedDevice.getName());
+        mSummary = mLayoutPreference.findViewById(R.id.entity_header_summary);
+        mSummary.setText("");
+
+        mBtnFindBroadcast = mLayoutPreference.findViewById(R.id.button_find_broadcast);
+        mBtnFindBroadcast.setOnClickListener(v -> scanBroadcastSource());
+        mBtnBroadcastLayout = mLayoutPreference.findViewById(R.id.button_broadcast_layout);
+        mBtnLeaveBroadcast = mLayoutPreference.findViewById(R.id.button_leave_broadcast);
+        mBtnLeaveBroadcast.setOnClickListener(v -> leaveBroadcastSession());
+        mBtnScanQrCode = mLayoutPreference.findViewById(R.id.button_scan_qr_code);
+        mBtnScanQrCode.setOnClickListener(v -> launchQrCodeScanner());
+
+        updateHeaderLayout();
+    }
+
+    private boolean isBroadcastSourceExist() {
+        return mBroadcastSourceList.getPreferenceCount() > 0;
+    }
+
+    private void updateHeaderLayout() {
+        if (isBroadcastSourceExist()) {
+            mBtnFindBroadcast.setVisibility(View.GONE);
+            mBtnBroadcastLayout.setVisibility(View.VISIBLE);
+        } else {
+            mBtnFindBroadcast.setVisibility(View.VISIBLE);
+            mBtnBroadcastLayout.setVisibility(View.GONE);
+        }
+    }
+
+    private void scanBroadcastSource() {
+        // TODO(b/228258236) : Call the LocalBluetoothLeBroadcastAssistant
+        //  to start searching for source
+    }
+
+    private void leaveBroadcastSession() {
+        // TODO(b/228258236) : Call the LocalBluetoothLeBroadcastAssistant
+        //  to leave the broadcast session
+    }
+
+    private void launchQrCodeScanner() {
+        // TODO(b/228259065) : Launch the QR code scanner page by intent
+    }
+
+    @Override
+    public void onDeviceAttributesChanged() {
+        if (mCachedDevice != null) {
+            refresh();
+        }
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_BROADCAST_HEADER;
+    }
+}