Merge changes I5dc3b8e8,Ic31092da,I6c011ae8,I5c5fb8de,Ia1c04358, ...

* changes:
  Remove cancel_pending flag
  Nothing interesting happens with ble_raw_size or ble_raw_used
  Nothing interesting happens with bta_dm_search_cb.p_ble_rawdata
  Remove unused raw data concepts from discovery results
  bta_dm_disc_result only happens in the discovery active state
  no need to set layer specific for discovery
  bta_dm_search_cancel can only happen in the active state
  bta_dm_search_cmpl always transitions to idle
  bta_dm_inq_cmpl can only happen in the active state
  Remove unused parameter from bta_dm_free_sdp_db
  Remove unused parameter from bta_dm_search_cmpl