• Make sure all Agents have a legacy type. This is necessary to
avoid crashes in LegacyNetworkTracker
• Wait for LOST when disconnecting a network
• Make sure the test package sees its own permissions (importantly
it can't see background networks otherwise, because it lacks
CHANGE_NETWORKING_STATE)
Test: in the followup
Change-Id: I9f699b6372a8fe0d5bcd5310d8f35f72e48a6c61