sensors: sync delay after sensor activated
sensors: sync delay after sensor activated

For some sensors, even in polling mode, we have to update the odr
which can't be done without enabling sensor, hence sync delay after
enabling sensor.

Change-Id: Idf5b479ae151e7975d1a8c015119aec9936d4252

redmi2/android_hardware_qcom_sensors,redmi2/android_hardware_qcom_sensors