ART: Add missing GetInterfaceMethodIfProxy

Add missing uses of GetInterfaceMethodIfProxy in reflection code.

Add a test case for a JNI call to a proxy method.

Bug: https://code.google.com/p/android-developer-preview/issues/detail?id=2973
Bug: 23886441

(cherry picked from commit e80673245c0433a71a4930e460be5dc0920885b2)

Change-Id: I5b66b64b5561fcee15d0314707d67e8abc02ce5b
6 files changed