Update MqttAndroidClient to fix InvalidClientHandle / IllegalArgumentException

[guness]

Fixes following issues: https://github.com/eclipse/paho.mqtt.android/issues/238 https://github.com/eclipse/paho.mqtt.android/issues/318 https://github.com/eclipse/paho.mqtt.android/issues/429

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• [x] If This PR fixes an issue, that you reference the issue below. OR if this is a new issue that you are fixing straight away that you add some Description about the bug and how this will fix it.
• [x] If this is new functionality, You have added the appropriate Unit tests.

[tabilzad]

any updates on this?

[tabilzad]

@icraggs doesnt seem like this repo is under active development anymore, although there are s number of outstanding issues. Who could we reach out to to have these addressed?