Merge changes I8b3c9cd4,Iedb0a81a,If7612988,I25f7c702,I23eb6baa, ...

* changes:
  Move decls to ble_hci interface
  Locally link and remove unused funcs stack/btm/btm_ble_privacy
  Remove duplicate decls stack/btm/btm_ble_int
  Move function decls with usage stack/btm::
  Explictly provide ble extern declarations
  Move stack/btm/btm_ble_addr::btm_ble_refresh_raddr_timer_timeout