Process the NetworkInfo before updating AccessPoints.

This fixes a UI issue where the Tracker first displays the connected
accessPoint as inactive before processing the connected state, which
causes the list to jump around.

Also add useful debugging information to AccessPoint toString.

Bug: 35681450
Test: runtest --path
frameworks/base/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/WifiTrackerTest.java
Change-Id: I9a8356cfdd2e5be2da58ce5de82e228fddf301f9