fix: connecting and disconnecting state issue

[juliansteenbakker]

Due to mLastProgress defaulting to -1 (STATE_CONNECTING) and a chec mLastProgress == progress, the callback onDeviceConnecting is never called. By changing the default to -0 (STATE_DISCONNECTED), the update is passed through.

By adding progress >= 0 && progress <= 100 to the check, we can keep track of the retries that have passed.

Lastly, STATE_DISCONNECTING was never set, so i've added this in the corresponding block.