Stricter NetworkNotificationManagerTest

This patch changes NetworkNotificationManagerTest to populate extraInfo
of NetworkInfo in order to catch regressions in malformed format Strings
of log statements in NetworkNotificationManager.

Test: verified that the test fails when reintroducing the format String
bug.
Bug: 33737715

(cherry picked from commit a865790a)

Change-Id: Ic2f23e860a17cb83b90edcfd2ba365134cacfe36