omx: prevent input port enable/disable for software codecs

Bug: 29421804
Change-Id: Iba1011e9af942a6dff7f659af769a51e3f5ba66f

void SimpleSoftOMXComponent::prepareForDestruction() {

    mLooper->unregisterHandler(mHandler->id());
    mLooper->stop();
}

void SimpleSoftOMXComponent::prepareForDestruction() {

    mLooper->unregisterHandler(mHandler->id());
    mLooper->stop();
}
