[Samples] Migrate from using a checked-in Android manifest to using a patcher at build time (#1002)

* Migrate from using a checked-in manifest to using a patcher at build-time

* Update AndroidManifestPatcher.cs

Author: keveleigh

UnityProjects/MRTKDevTemplate/Assets/Plugins/Android.meta

@@ -0,0 +1,34 @@
+// Copyright (c) Mixed Reality Toolkit Contributors
+// Licensed under the BSD 3-Clause
+
+using System;
+using System.Collections.Generic;
+using Unity.XR.Management.AndroidManifest.Editor;
+using UnityEngine.XR.OpenXR;
+
+/// <summary>
+/// Adds a required manifest entry to use the virtual keyboard on Quest.
+/// </summary>
+internal class AndroidManifestPatcher : IAndroidManifestRequirementProvider
+{
+    /// <inheritdoc/>
+    ManifestRequirement IAndroidManifestRequirementProvider.ProvideManifestRequirement() => new()
+    {
+        SupportedXRLoaders = new HashSet<Type>()
+        {
+            typeof(OpenXRLoader)
+        },
+        NewElements = new List<ManifestElement>()
+        {
+            new()
+            {
+                ElementPath = new List<string> { "manifest", "uses-feature" },
+                Attributes = new Dictionary<string, string>
+                {
+                    { "name", "oculus.software.overlay_keyboard" },
+                    { "required", "false" }
+                }
+            }
+        },
+    };
+}

UnityProjects/MRTKDevTemplate/Assets/Plugins/Android/AndroidManifest.xml

@@ -22,7 +22,7 @@
     "com.unity.xr.arcore": "5.0.5",
     "com.unity.xr.arfoundation": "5.0.5",
     "com.unity.xr.interaction.toolkit": "2.3.2",
-    "com.unity.xr.management": "4.3.3",
+    "com.unity.xr.management": "4.4.0",
     "com.unity.xr.openxr": "1.7.0",
     "org.mixedrealitytoolkit.accessibility": "file:../../../org.mixedrealitytoolkit.accessibility",
     "org.mixedrealitytoolkit.audio": "file:../../../org.mixedrealitytoolkit.audio",

UnityProjects/MRTKDevTemplate/Assets/Plugins/Android/AndroidManifest.xml.meta

@@ -285,7 +285,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.xr.management": {
-      "version": "4.3.3",
+      "version": "4.4.0",
       "depth": 0,
       "source": "registry",
       "dependencies": {