system: core: Add Sensors group

Defining group for sensors.

CRs-Fixed: 431081

Change-Id: I58151f2fd727bded1b16adb3caeac85e27e44036
core: Correct the sensors UID

Change-Id: I4e456de6dfa6612caf9dcef751f39e9e478a775e
Merge pull request #20 from CyanogenMod/cm-11.0

Upstream