Notif manager and captive portal app to read SSID again

Cherry-picked from ag/3887738 ; almost clean CP, only had
to add an import.

Bug: 77114259
Test: frameworks-net pass
      manual test shows the SSID is now displayed again
Change-Id: I5cb2b4777ad78d972031e8f2ff22e2155f4ab894
Merged-In: I588fedba49ea5d08e40bd2b3ea8ba2c2383958ec
Merged-In: I663a59ff2847a9f44ea1395326f6cb00e97237b6