CTS Verifier Bluetooth Test

Add the following tests:
- Toggle Bluetooth - Make sure BT can be disabled and enabled
- Secure Server/Client - Make sure a secure sockets work between
  two devices.
- Insecure Server/Client - Make sure insecure sockets work between
  two devices.

Remove the Arduino Bluetooth helper files, since this CTS Verifier
test should cover the same testing.

Change-Id: Ifd8ace2b29bbfdbb120953f837e627e96c7d3f7b
18 files changed