tree bded4c9c522a33bc875228c6670e25d603da13f0
parent 6cfb44952a76303fe1c7cc75b545cb8aad72eecf
author Jason Monk <jmonk@google.com> 1418402995 -0500
committer Jason Monk <jmonk@google.com> 1420491180 -0500

Don't unregister MobileSignalControllers still used

Also add some more testing for this section of code that manages
when MobileSignalControllers are added/removed to make sure we
are all good.

Bug: 18728593
Change-Id: I9902854c54d2e1deb58b38b7bd97dac1617831c0