Messaging: Use ActivityResultContracts for media and contacts

Instead of handling showing and picking the media ourselves,
use existing AcitivityResultContracts to pick images, videos
or contacts

Change-Id: I20079ad94882cc6bbfeae8d57ca0e4aa30612c01

res/menu/gallery_picker_menu.xml

@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-    Copyright (C) 2015 The Android Open Source Project
-    Copyright (C) 2024 The LineageOS 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.
--->
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:appcompat="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools" >
-
-    <item
-        android:id="@+id/action_multiselect"
-        android:icon="@drawable/ic_checkbox_outline_light"
-        android:orderInCategory="100"
-        android:title="@string/action_multiselect"
-        appcompat:showAsAction="always"/>
-
-    <item
-        android:id="@+id/action_confirm_multiselect"
-        android:icon="@drawable/ic_checkmark_light"
-        android:orderInCategory="101"
-        android:title="@string/action_confirm_multiselect"
-        appcompat:showAsAction="always"/>
-</menu>