Revert "Revert "system: core: Add Sensors group""

This reverts commit 447af32ad6d6d1a5f3454f8e7d8441b9c4ab3326.

Change-Id: Id6613ecfa5f5fbace92c54d70c488cbe7891cacd
Merge "Revert "Revert "system: core: Add Sensors group""" into kitkat