android.hardware.tests.msgq@1.0: modify ITestMsgQ

Modify the configure() method so that the implementation does not have
to rely on status_t to return service errors.

b/31367910
b/31348667

Change-Id: I0bc88c396ce4e55ed38b534b7e3ae2c0a4faad62
Signed-off-by: Iliyan Malchev <malchev@google.com>