MethodHandles: Better detail message for WrongMethodTypeExceptions

We now include the type of the callee and the callsite.

This change also fixes a call to ThrowWrongMethodTypeException that
passed arguments in the wrong order.

Test: make test-art-host

Change-Id: I3ced2e331cb49b616a8374f5a604dafa37330059
diff --git a/runtime/common_throws.cc b/runtime/common_throws.cc
index 0251776..9f0dbbb 100644
--- a/runtime/common_throws.cc
+++ b/runtime/common_throws.cc
@@ -813,13 +813,11 @@
 
 void ThrowWrongMethodTypeException(mirror::MethodType* callee_type,
                                    mirror::MethodType* callsite_type) {
-  // TODO(narayan): Should we provide more detail here ? The RI doesn't bother.
-  UNUSED(callee_type);
-  UNUSED(callsite_type);
-
   ThrowException("Ljava/lang/invoke/WrongMethodTypeException;",
                  nullptr,
-                 "Invalid method type for signature polymorphic call");
+                 StringPrintf("Expected %s but was %s",
+                              callee_type->PrettyDescriptor().c_str(),
+                              callsite_type->PrettyDescriptor().c_str()).c_str());
 }
 
 }  // namespace art