broadcast radio fuzzer: remove vendor

This fuzzer was crashing immediately due to a
hermeticity issue where a vendor variant of libbinder
was used underneath libbinder_ndk (b/307611931).

Now, it is hanging in ~WorkerThread.

Fixes: 307611931
Test: run fuzzer
Change-Id: Iba16c6eefeb508e41951ba9f5b3e4fc7e2fc3457