There is a potential threading issue where an app could call release()
on two threads. This hack adds a static lock object that serializes
access to the Java fields that contain the pointer to the native
AudioRecord object and weak reference to the Java object. Also
modifies finalize() to call release() so that both use the locking
scheme.
Change-Id: I09dcb19b7f501dc582e40e8718142b493eba2518
e6335c904a