Merge "binderRpcTest: fix OnewayCallQueueing flake" am: ccb2d05f

    EXPECT_OK(proc.rootIface->lock());

    for (size_t i = 0; i < kNumSleeps; i++) {

        // these should be processed serially

    size_t epochMsBefore = epochMillis();

    // all these *Async commands should be queued on the server sequentially,

    // even though there are multiple threads.

    for (size_t i = 0; i + 1 < kNumSleeps; i++) {

        proc.rootIface->sleepMsAsync(kSleepMs);

    }

    // should also be processesed serially

    EXPECT_OK(proc.rootIface->unlockInMsAsync(kSleepMs));

    size_t epochMsBefore = epochMillis();

    // this can only return once the final async call has unlocked

    EXPECT_OK(proc.rootIface->lockUnlock());

    size_t epochMsAfter = epochMillis();

    EXPECT_GT(epochMsAfter, epochMsBefore + kSleepMs * kNumSleeps);