[Provider Model] Listen for callback to highlight WiFi network

- The Highlighting WiFi network refers to the
WifiEntry#hasInternetAccess() function.

- The WifiEntry#hasInternetAccess() might not be updated immediately
when ConnectivityManager calls back a connected WiFi entry with Internet
capabilities.

- Need to listen the WifiEntry.onUpdated() callback to aware that
WifiEntry#hasInternetAccess() has been updated correctly.

- Also fixed a missing update for the WiFi max count issue

- See b/208701968#comment4 for the result video.

Bug: 208701968
Test: manual test
atest -c InternetAdapterTest \
         InternetDialogControllerTest \
         InternetDialogTest

Change-Id: I59be23643678c892f37ab8d4c7d2e33cb8c8f5b2