Allow btsnoop logs to be read over a local socket.

This change allows real-time HCI debugging over adb from a
Linux box using hcidump.

Example:
--------
adb forward tcp:8872 tcp:8872
nc localhost 8872 | hcidump -X -r /dev/stdin

Change-Id: I49c32a941f71f612807061284a755a38b76588ff
4 files changed