Allow sensor hal to use wakelock

Added permission related to use of wake lock. Wakelock in sensor
HAL is used to gurantee delivery of wake up sensor events before
system go back to sleep.

Bug: 63995095
Test: QCOM and nanohub sensor hal are able to acquire wakelock
      successfuly.

Change-Id: Id4ac3552e18a1cad252017e3dc9ab3d4be8d4ab9
1 file changed