Python3 Migration: chameleond

Make the chameleond directory Python 2&3 compatible.

BUG=b:169724328
TEST=Conduct the following tests
python3 -m compileall -q .
python2 -m compileall -q .
python3 -m py_compile *.py
python2 -m py_compile *.py
Bluetooth AVL tests

Change-Id: I00cc916337f0a64e39a19a6ad6506535910ba404
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/chameleon/+/2497729
Reviewed-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Tested-by: Shyh-In Hwang <josephsih@chromium.org>
Commit-Queue: Shyh-In Hwang <josephsih@chromium.org>
1 file changed