Revert "binder: fix UAF caused by faulty buffer cleanup"

This reverts commit e1e198ef.

It breaks the Android KABI and will be brought back at a later time when
it is safe to do so.

Bug: 161946584
Change-Id: I66f4d99f9adce21b7eb4a78cb6775f1df69a4343
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>