Merge pull request #936 from google/gbg/usb-transport-packet-splitter

usb transport packet splitter

Merge pull request #928 from zxzxwu/avdtp

AVDTP: Avoid explicit in_use management

Merge pull request #913 from zxzxwu/sdp

SDP: Fix wrong parameter size

Merge pull request #907 from zxzxwu/example-gatt-client-and-server

Advertise in run_gatt_client_and_server

Merge pull request #893 from zxzxwu/le-emu

Emulation: Support LE Read features

Merge pull request #882 from zxzxwu/hci

Fix wrong LE event codes

Merge pull request #880 from google/gbg/command-status-hack

add workaround for some buggy controllers

Merge pull request #867 from zxzxwu/fix-import-error

Fix missing ClassVar import

Merge pull request #853 from zxzxwu/l2cap

L2CAP: Fix segmentation and frame ack

Merge pull request #851 from zxzxwu/fix

Fix some typos and annotations