ServiceManager: Allow system services running as secondary users to add services am: e6bbe69ba7 am: 2cb14836ac am: c29c3734af am: ce0e72911c am: 2c39ea1025
am: fa5aafc9f3

Change-Id: I2b83c66f04f7dbfb1740d525ba6d424c9ea42c2b