Invalid binding for java.util.SortedMap

[jpobst]

Today we bind java.util.SortedMap as Android.Runtime.JavaDictionary so it feels more like using .NET types. However, JavaDictionary does not implement ISortedMap, causing this error when attempting to use the type at runtime:

JNI ERROR (app bug): attempt to pass an instance of java.util.HashMap as argument 1 to void org.osmdroid.views.overlay.advancedpolyline.ColorMappingRanges.<init>(java.util.SortedMap)

Code specifying this conversion:
https://github.com/xamarin/java.interop/blob/master/tools/generator/Java.Interop.Tools.Generator.ObjectModel/Symbols/SymbolTable.cs#L212

To fix this we will need to create something like JavaSortedDictionary and map it to java.util.SortedMap.

Workaround

To work around this, the generated member can be deleted via metadata and manually bound to a type which implements SortedMap (TreeMap) with an Addition.

For example, here is a constructor that takes a java.util.SortedMap:

public Foo (final TreeMap p0) 
{
  const string __id = "(Ljava/util/SortedMap;)V";
  if (((global::Java.Lang.Object) this).Handle != IntPtr.Zero)
  	return;
  IntPtr native_p0 = JNIEnv.ToLocalJniHandle (p0);
  try {
	  JniArgumentValue* __args = stackalloc JniArgumentValue [1];
  	__args [0] = new JniArgumentValue (native_p0);
  	var __r = _members.InstanceMethods.StartCreateInstance (__id, ((object) this).GetType (), __args);
  	SetHandle (__r.Handle, JniHandleOwnership.TransferLocalRef);
  	_members.InstanceMethods.FinishCreateInstance (__id, this, __args);
  } finally {
  	JNIEnv.DeleteLocalRef (native_p0);
  }
}