[Audiosharing] Add audio sharing stream name preference.

Flagged with enable_le_audio_sharing

Bug: 305620450
Test: Manual
Change-Id: I1502fb824bcf612d069ee24d7af67afda5e997bb

res/layout/preference_widget_qrcode.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2023 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.
+  -->
+
+<ImageButton xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/button_icon"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:minWidth="@dimen/two_target_min_width"
+    android:minHeight="@dimen/min_tap_target_size"
+    android:layout_gravity="center"
+    android:background="?android:attr/selectableItemBackground"/>