Now the apps responsibility to enable config mode for radio chip

- Opening com.fightingwalrus.config accessory protocol no longer
  enables AT mode on radio chip due to timing issue since radio
  goes into low power whenever EAAccessory connection is torn down.
  The current solution is reset any EAAccessory connection and bring
  up a new connection using the com.fightingwalrus.config protocol to
  disable any com.fightingwalrus.telemetry or other protocol specific
  handling on the device, wait a second or two for the radio to boot.
  Then send "+++" to put the SoC radio into AT mode. Once an OK comes
  back normal AT radio config commands can be sent.