system: core: Add Sensors group

Defining group for sensors.

CRs-Fixed: 431081

Change-Id: I58151f2fd727bded1b16adb3caeac85e27e44036
IMS-VT: Define IMS group.

Define IMS group.

CRs-Fixed: 615689

Conflicts:
	include/private/android_filesystem_config.h

Change-Id: Ie7fed3090a20db1e27a03d2d2cdde443d7ff5435
core: Correct the sensors UID

Change-Id: I4e456de6dfa6612caf9dcef751f39e9e478a775e