[Wi-Fi] Apply WifiEntry onUpdate to support refresh WiFi detail page for OpenRoaming feature.

Issue: The preference UIs status didn't chage dynamically.
Solution: update the preference UI status when onUpdated is called.

Bug: 146669261
Test: 1.manually mofidy framework to test.
      2.The getAvailabilityStatus() already tested in
      WifiSubscriptionDetailPreferenceController2Test.
Change-Id: I51b5e67df7998d7d3e9ede9ead7aa49ad574c7a3