Merge changes from topic "NIAP for AOSP"

* changes:
  btif_config: Fix pointer to freed memory
  NIAP: Add a map to store the LTTKM
  NIAP: Use bluetooth keystore to encrypt/decrypt LTTKM.
  NIAP: implement bluetooth keystore interface.(2/2)
  NIAP: Add new argument to determine config checksum check result.(2/4)
  NIAP: Add keystore.proto for java layer usage.
  NIAP: remove keystore related code for now.