[release/9.0.1xx][Mono.Android] Generate API docs for API level 36 (#10031)

Updates xaprepare and Mono.Android to generate API docs against
API-36 sources.

Author: pjcollins

build-tools/xaprepare/xaprepare/ConfigAndData/Dependencies/AndroidToolchain.cs

@@ -75,11 +75,11 @@ public AndroidToolchain ()
 				new AndroidPlatformComponent ("platform-35_r01",   apiLevel: "35", pkgRevision: "1", isLatestStable: true),
 				new AndroidPlatformComponent ("platform-36_r01",   apiLevel: "36", pkgRevision: "1", isLatestStable: true),
 
-				new AndroidToolchainComponent ("source-35_r01",
-					destDir: Path.Combine ("sources", "android-35"),
+				new AndroidToolchainComponent ("source-36_r01",
+					destDir: Path.Combine ("sources", "android-36"),
 					pkgRevision: "1",
 					dependencyType: AndroidToolchainComponentType.BuildDependency,
-					buildToolVersion: "35.1"
+					buildToolVersion: "36.1"
 				),
 				new AndroidToolchainComponent ("docs-24_r01",
 					destDir: "docs",

src/Mono.Android/Mono.Android.targets

@@ -238,7 +238,7 @@
 
   <PropertyGroup>
     <!-- Override these properties to generate docs against a specific API level -->
-    <DocsApiLevel Condition=" '$(DocsApiLevel)' == '' ">35</DocsApiLevel>
+    <DocsApiLevel Condition=" '$(DocsApiLevel)' == '' ">36</DocsApiLevel>
     <DocsPlatformId Condition=" '$(DocsPlatformId)' == '' ">$(DocsApiLevel)</DocsPlatformId>
     <DocsFxMoniker Condition=" '$(DocsFxMoniker)' == '' ">net-android-$(DocsApiLevel).0</DocsFxMoniker>
     <DocsExportOutput Condition=" '$(DocsExportOutput)' == '' ">$(_MonoAndroidNETDefaultOutDir)Mono.Android.xml</DocsExportOutput>