cfb3657167
Keep track of requests as well as of networks that come and go. This is necessary, for example, to ensure that we pretend that HIPRI has gone down when the HIPRI request goes away, even though the underlying cell network is actually completely unaffected. Also, ensure that when switching default networks we send disconnect broadcasts (and do so *before* connect broadcasts, to maintain the illusion). Bug: 16610051 Change-Id: Ib3c831387124940156df05b312cc36bc0724373e