BTIF and stack changes for batch scan feature

Change-Id: I4dd2d551435e9f1f0e43906bd695294e97ed4bba

* commit '788c863d':
  Clear background conn list entries during BT power off

am c28001d9: Merge "Bluetooth: Updates background conn list properly during unpair" into klp-wireless-dev

* commit 'c28001d9':
  Bluetooth: Updates background conn list properly during unpair

This clears whitelist entries and resets  bgconn device lists

Change-Id: I551791d63fa826071c113abd383540838f6c59b2

Do not set the automatically-flushable packet flag for LE bound HCI
packets (Packet_Boundary_Flag 0b10).

Reported-by: Richie Hsieh <richie.hsieh@mediatek.com>
Change-Id: Id71a096acee70582923e652cfef1f4141b721fed

* commit '5390646c':
  Bluetooth: Restarting PM timer during incoming rfcomm data.

* commit '889c8823':
  GAP: Remove device info from storage on Pairing Cancel

* commit '47a2b592':
  GAP:Add authentication failed error code in auth_compl_evt.

* commit 'd6915572':
  [2/2] Bluetooth: Security: Handle authentication rejected error status

* commit 'd6cdbab9':
  Bluetooth: Handle missing key event

* commit 'b1a8ad0a':
  Bluetooth: Fix to avoid NULL pointer dereferences

* commit '83f968e2':
  GAP: Retain the old COD if already present

* commit '3270c976':
  L2CAP: Send HCI connect with all packet types supported

During incoming rfcomm data, we were setting the pm mode to
active, thereby stopping timer and never restarting it again.
So Dut was never going to sniff , if the last packet is incoming
packet. Therefore add change to restart the PM timer during incoming
data.

Change-Id: I4396bb2f267b12cb92a944c15609ddeaa13288ad

Remove paired device information for SSP devices from the BT-IF
layer storage on pairing cancel.

Change-Id: I4660e3659866bd66339350b5cdb92bf3ad3cc850

There is an unhandle failed HCI error code when pairing with
symbian OS phone nokia n95 which will cause no prompt when
auth failed.

Change-Id: I3a37c7732d1bf71c090bb968380d8c5f0af2ff79

Handle error codes in authentication complete event with failures
like reject pairing , unspecified error.

Change-Id: I392b7531a8625efbf91bf80f7f617a6954229892

This change handles HCI_ERR_KEY_MISSING event
coming to the stack when user doesn't enter any
key and timeout happens.

Change-Id: If530e8acce3f105e4f1e2841bf350ee5330f389e

This fix for avoiding NULL pointer dereferences:
 - Added check for state checking in btm_remove_acl function
   to avoid sending disconnect command if already in Disconnecting
   state.
 - Added NULL check for 'pin_code' in btif_dm_pin_reply function
 - Null check before accessing in BD interface layer configuration
   node variables.
 - Add NULL check before accessing p_bd_addr variable to avoid null
    pointer exception while referring to invalid memory.

Change-Id: Ib7ed45b6a1692785a45224d739a564f767e5b10f

Retain the old COD as the initial value if the device
entry already present in the list and entry is not in use.

Change-Id: I99b7269b1976ef7458c6568441e6e3c1e015a75f

HCI create connect function is now supporting only single slot packet
during HCI connection initiation. Added support for all basic rate
packet types.

Change-Id: Ieeb892ea43dc9bb801a8f97a644a0f8c06b8184a

* commit 'a09d6230':
  GAP: Handle invalid SDP service search request

* commit 'b8041062':
  GAP: Handled collision scenerio with headset

* commit '99c06b6c':
  Fix build: remove bte_version.c from makefile since it's not in the tree.

Change-Id: I4e488cadd2b52e41ec83e4b2acac2dd7f9ca5b61

* commit 'c2099c7d':
  Add a flexible array to the end of BT_HDR to avoid pointer arithmetic.

* commit '1060af76':
  Eliminate HCI flow control. It is not used anywhere in the codebase.

* commit '5745a1d4':
  Remove BTE/BTIF version strings. DID profile should specify stack version info.

This change should clean up a lot of code. I've verified sizeof(BT_HDR)
remains constant after this change on ARM, x86, and x86_64.

Change-Id: I762351fa0f24a587da190de3e522bc74e497c542

Change-Id: If7244bdcf08023b0a093374950d6a5c1974fbbba

* commit '65fb4570':
  Eliminate unused argument to dealloc.

* commit '861d6d1f':
  Add documentation and non-blocking functions to fixed_queue.

Change-Id: I27806f8a88f7ea81ccab1fe48ab826ba428357e0

Change-Id: I9e54a9b9e8e250aa39e4fbfcbe934e7686d74cd4

Change-Id: Ia13166238847d6e1cebfda1bf5bdafd9ddc8b8e1

Change-Id: Ib968b55b407f6c4413d53623113c47f335c5f800

* commit '1a13191e':
  LE: Add is_connected() function (2/3)

* commit 'f5e7138c':
  LE: Add notification sent and congestion callbacks (2/4)

* commit 'de86d49a':
  Add documentation for semaphore and add a semaphore_try_wait function.

* commit '602493ee':
  BLE privacy timer