[generator] strip fields and methods that have '$' in the name.

Related: https://bugzilla.xamarin.com/show_bug.cgi?id=46344#c12

class-parse has brought another problem; it generates fields and methods
that are compiler-generated and should not have been written to XML
in the first place.

class-parse has no idea on how to deal with them, so kill them in
api-xml-adjuster instead.

Author: atsushieno

src/Xamarin.Android.Tools.ApiXmlAdjuster/JavaApiNonBindableStripper.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Xamarin.Android.Tools.ApiXmlAdjuster
+{
+	public static class JavaApiNonBindableStripper
+	{
+		public static void StripNonBindables (this JavaApi api)
+		{
+			var invalids = new List<JavaMember> ();
+			foreach (var member in api.Packages.SelectMany (p => p.Types)
+			         .SelectMany (t => t.Members).Where (m => m.Name != null && m.Name.Contains ('$')))
+				invalids.Add (member);
+			foreach (var invalid in invalids)
+				invalid.Parent.Members.Remove (invalid);
+		}
+	}
+}

src/Xamarin.Android.Tools.ApiXmlAdjuster/Xamarin.Android.Tools.ApiXmlAdjuster.csproj

@@ -42,6 +42,7 @@
     <Compile Include="JavaApiTypeResolverExtensions.cs" />
     <Compile Include="JavaApiOverrideMarkerExtensions.cs" />
     <Compile Include="JavaApiGeneralExtensions.cs" />
+    <Compile Include="JavaApiNonBindableStripper.cs" />
     <Compile Include="JavaApi.RelationAnalysisModel.cs" />
     <Compile Include="JavaTypeReference.cs" />
     <Compile Include="JavaApiGenericInheritanceMapperExtensions.cs" />

tools/generator/ApiXmlAdjuster.cs

@@ -23,6 +23,7 @@ public void Process (string inputXmlFile, GenBase [] gens, string outputXmlFile,
 			var api = new JavaApi ();
 			api.LoadReferences (gens);
 			api.Load (inputXmlFile);
+			api.StripNonBindables ();
 			api.Resolve ();
 			api.CreateGenericInheritanceMapping ();
 			api.MarkOverrides ();