authsecret: Notify LSS to generate secret

In order to prevent storing testing secret to Citadel
during authsecret testing, we try to notify lock setting
service to generate PIN code send corresponding secret to
Citadel before authsecret VTS testing.

LSS will not generate new secret if it had ever generated
PIN code/Password/Pattern before.

Bug: 150929955
Bug: 163064036
atest VtsHalAuthSecretV1_0TargetTest

Change-Id: I6b58bf90d16db16ce2a78d8b73298e042c049fc3