[event-input] Do not poll datapipes
[event-input] Do not poll datapipes

In general polling datapipe values should be avoided.

Track datapipe changes and cache values locally.

Signed-off-by: Simo Piiroinen <6d5e5360bed3d486f7d9fb26b0f737f7d4fd45ee@jollamobile.com>

spiiroin/mce,spiiroin/mce,spiiroin/mce,spiiroin/mce