AndroidX support and updates

[bazted]

Upgrade Android Gradle Plugin to 3.5.3
Upgrade Gradle Wrapper to 6.0.1
Use AndroidX LocalBroadcastManager
Clean repo and improve .gitignore
Added required permission to manifest

[glanderson42]

Hey! Is scanning worked for you?

[bazted]

Hey @glanderson42. Yes, scanning worked correctly. Do you have any issues?

[bazted]

Oh, the code for asking location permission is not in the PR. I will add it and then everything should work fine. Currently, you can allow the location permission in the Applications Settings and scanning will work.

[glanderson42]

I think I forgot to add it too. I will give it a try tomorrow

[glanderson42]

I've added

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

and give permission to the app to access the location but scanning is still not work.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

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