Add new audio channel mode dialog layout for new Bluetooth developer option

- new reminder information

Bug: 142227996
Test: manual
Change-Id: I07614b28552cc2eb1fdcb30bf49a395cc17991f7

res/layout/bluetooth_audio_channel_mode_dialog.xml

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 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.
+-->
+
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="8dp">
+
+        <RadioGroup
+            android:id="@+id/bluetooth_audio_channel_mode_radio_group"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/developer_option_dialog_margin_start">
+
+            <include
+                android:id="@+id/bluetooth_audio_channel_mode_default"
+                layout="@layout/preference_widget_dialog_radiobutton"/>
+
+            <include
+                android:id="@+id/bluetooth_audio_channel_mode_mono"
+                layout="@layout/preference_widget_dialog_radiobutton"/>
+
+            <include
+                android:id="@+id/bluetooth_audio_channel_mode_stereo"
+                layout="@layout/preference_widget_dialog_radiobutton"/>
+        </RadioGroup>
+
+        <include
+                android:id="@+id/bluetooth_audio_codec_help_info"
+                layout="@layout/preference_widget_dialog_summary"/>
+
+    </LinearLayout>
+
+</ScrollView>
+