Batching Data

A way to batch sensor data updates (eg. to get a high rate of changes without frequent context switching).

The FIFO API (QTBUG-25883) makes this much more useful though it's not an absolute requirement. We can serially deliver the batched readings as they arrive.

Symbian delivered sensor data in "batches" and you set the minimum and maximum sizes you wanted (eg. min=1, max=10 means I'd like to get each event as it happens but you can batch up to 10 events if the system is busy). Setting max=1 meant readings were dropped if the system was busy.