[sensors][permission] Add new permission types in permission module.

This is the first part of adding permission guard for sensors based on Generic Sensor Framework.
There was consensus to add granular permissions for sensors here
https://github.com/w3c/sensors/issues/22

This CL adds permission name for the different sensors in the permission module.

Spec discussion : https://github.com/w3c/permissions/pull/142

BUG=606766

Review-Url: https://codereview.chromium.org/2791623004
Cr-Commit-Position: refs/heads/master@{#491303}
15 files changed