Merge changes I4ddc6e35,I931bd052,I5bf0c9e2,I10390d03,I6ebe3fb7, ...

* changes:
  Flatten BTA_DM_API_SEARCH_CANCEL_EVT
  Remove unused pram from bta_dm_search_clear_queue
  Remove unused pram from bta_dm_search_cancel
  fold on_inquiry_complete into bta_dm_inq_cmpl
  Pass params to on_inquiry_complete instead of messages
  Pull BTA_DM_INQUIRY_CMPL_EVT out of state machine
  Remove unused arg from bta_dm_search_cancel_cmpl
  Remove unused arg from bta_dm_search_cancel_notify
  Flatten bta_dm_search_cancel_transac_cmpl
  Remove unused rs_res parameter & friends