hci: assert hci_get_sco_packet_length is smaller or equal to sco packet size

hci: use active voice settings for CSR SCI-over-HCI fix

gap: add gap_secure_connection to check if encryption key results from LE Secure Connection Pairing

hci: remove sco debug output

hci: use voice settings for active connection

hci: avoid division by zero for sco packet length calculation with usb transport

hci: only pause during halting if hci_halting_defer is called after receiving BTSTACK_EVENT_STATE

hci: pause 500 ms during halting

hci: fix compile

hci: calculate SCO payload length based on used hci transport and voice settings, drop hacks in sco_demo_util

hci: track outgoing / received SCO bytes to calculate num SCO slots used in controller

hci: unify num_acl_packets_sent + num_sco_packets_sent into single num_packets_sent in hci_connection_t

hci: implement implicit flow control for SCO packets

hci: release outgoing buffer on disconnect if waiting to send another ACL fragment

hci: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT

hci: enable le events for phy update and channel selection

gap: add gap_le_set_phy command

hci: return after sending hci cmd in hci_run()

hci: check if LE Set Defaut PHY is supported

remove explicit memset call for buffers from btstack_memory

hci/gap: save the le connection interval on connection complete and connection update

hci: fix compile without CLASSIC

hci/gap: support snif mode

hci: track connection mode

gap: add gap_set_default_link_policy_settings