How do you know Qualcomm are not already tuning their SoCs - the majority of which end up running Android OS - for that OS? If Qualcomm aren't already doing this, it feels like a massive failure. They know who their customers are and Google would certainly be co-operative outside of the semi-open development of AndroidOS for device manufacturers.
Apple is developing its hardware and software platforms in parallel; other semiconductors that use Android are obviously adjusting themselves to current and future Android OS iterations, but it obviously does not give the latter the same flexibility on both river banks (hw/sw).