fix: have overlay show correct png on onResume

[mnbpdx]

It looks like when onResume() was in a "disconnected" state, it was sending OverlayStatus.Connected to showOverlay() rather than OverlayStatus.Disconnected.

Could be wrong about this, I'm decently new to Android/coding in general so please check my work. That being said, my test device was showing the "connected" PNG when disconnected, and this seemed to solve it.

In fact, my device always showed the "connected" PNG, I think because the "disconnected" PNG that was set up in onCreate() was immediately being re-drawn by onResume().

Before changes (on initial start up, fresh install):

After:

[mnbpdx]

While we're at it, that block of code is basically identical in both onCreate() and onResume(), I can pull it into its own method if ya like.

[jlucidar]

Thanks @mnbpdx for your contribution !
It's already been fixed in #73 , with probably some other small issues :)
For your futur contributions, could you please make your PR to the "dev" branch instead of the master one ?
master is supposed to reflect what is shipped currently, dev is the latest non stable version with all the new features.

[mnbpdx]

Ahh bummer, tried to search for it but must have missed it.

And I will make any future PR's to dev, thanks for calling that out!