Jayson Messenger 9cd1890faa Adding in context manager for Connection and Peer classes ...

* Connection implements async context manager to disconnect when
  context is left
    * The Connection only calls disconnect if the context manager exits
      without an exception
* Peer implements async context manager to discover when entering the
  context
* Device.connect_as_gatt implements an async context manager to nest the
  connection and peer context managers
* Added HCI_StatusError that can be raised when a HCI Command Status
  event is received that doesn't show "PENDING" as status
* Added Connection.sustain to wait for a timeout or disconnect
* Peer.sustain also maps to Connectin.sustain
* Updated battery_client.py to use .connect_as_gatt and .sustain
* Updated heart_rate_client.py to use .connect_as_gatt and .sustain

2022-07-27 14:03:12 -04:00

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