Show a dialog if bluetooth key is missing when reconnecting

Previous change is reverted due to test failure in b/362901443.

BUG: 360031750
Test: atest BluetoothKeyMissingDialogTest
Flag: com.android.settings.flags.enable_bluetooth_key_missing_dialog
Change-Id: I05b940e8aac26c14f93baa19c224ad98c291b891

res/layout/bluetooth_key_missing.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+~ 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.
+-->
+
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingTop="@dimen/bluetooth_dialog_padding_top">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingStart="24dp"
+        android:paddingEnd="24dp">
+
+        <ImageView
+            android:id="@id/preview_placeholder"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:layout_gravity="center"
+            android:importantForAccessibility="no"
+            android:src="@drawable/ic_warning_24dp"
+            android:tint="@color/settingslib_materialColorOutline" />
+
+        <TextView
+            android:id="@+id/bluetooth_key_missing_title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:textAppearance="@*android:style/TextAppearance.DeviceDefault.Title" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:text="@string/bluetooth_key_missing_message"
+            android:textAppearance="@*android:style/TextAppearance.DeviceDefault.Body1" />
+
+    </LinearLayout>
+
+
+</ScrollView>