It needs the APIs to set/get the CA certificate for remediation server. Bug: 116346527 Test: ./frameworks/base/wifi/tests/runtests.sh Test: tested with R2 AP for connection and verified that the CA certificate is saved into keyStore. Test: tested with R1 credential Change-Id: I8568935234a6197e83f1b997f145b7e98dc56497 Signed-off-by: Ecco Park <eccopark@google.com>