Update LegacyTypeTracker state before sending connect broadcasts.

Currently, LegacyTypeTracker sends out connected broadcasts
before updating its internal lists of networks. This creates a
race condition where an app can query LegacyTypeTracker state
(e.g., via getActiveNetworkInfo) as soon as it gets the
broadcast, and get information that has not been updated.

Bug: 17540101
Change-Id: Iefd6d5e9fd0b427c5872166208831f70fcef8b6f