Merge "Revert "Only spawn one binder thread for cmd."" into pi-dev-plus-aosp

{

    signal(SIGPIPE, SIG_IGN);

    sp<ProcessState> proc = ProcessState::self();

    // setThreadPoolMaxThreadCount(0) actually tells the kernel it's

    // not allowed to spawn any additional threads, but we still spawn

    // a binder thread from userspace when we call startThreadPool().

    // This is safe because we only have 2 callbacks, neither of which

    // block.

    // See b/36066697 for rationale

    proc->setThreadPoolMaxThreadCount(0);

    proc->startThreadPool();

#if DEBUG