hotspot2: add support for managing Passpoint configurations

Add the initial support to PasspointManager for managing Passpoint
configurations.

More todos:
- add support to WifiKeyStore for installing/removing keys and certificates
  in the Passpoint configurations
- add support to WifiConfigStore for loading/storing Passpoint configurations
  from/to the persistent storage

Bug: 32618351
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: download/install Boingo passpoint profile and verify configure is installed
      using log messages
Merged-In: Id394bcf7514157bfaa3038b3f9f4d1003671d11f
Change-Id: Id394bcf7514157bfaa3038b3f9f4d1003671d11f
5 files changed
tree: ecf8d364497d9cfe64f5b76026beeb4b88a1bbef
  1. service/
  2. PREUPLOAD.cfg