binderLibTest: catch binder driver with reversed freezing

This catches the Rust Binder bug that is being fixed by aosp/3037496.

Previously, this test would just get skipped since Rust Binder returned
-EAGAIN on this call. The correct error code for the ioctl being
unsupported is -EINVAL.

Test: Ran test with Rust Binder with and without fix
Test: Ran test with C Binder and it still passes
Change-Id: I6f8b7721e6769053062183710ae81e890fd794bb
Signed-off-by: Alice Ryhl <aliceryhl@google.com>