input: sensors: add sensor class poll_delay interface for apds9930

Sensor of apds9930 work with sensor class, so add sensor class poll_delay
interface.

CRs-Fixed: 652033
Change-Id: I15746c4f4b1206032995001256a860a2530e03a7
Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>