CVE-2026-98774: rust_binder: cancel deferred work items in thread exit

In the Linux kernel, the following vulnerability has been resolved: rust_binder: cancel deferred work items in thread exit If there are deferred work items on the thread todo list, then they are not cleaned up in the Thread::release() method. Thus, update the code to clean up the work items even if they are deferred. This can happen if the thread dies while it has an active outgoing transaction.