fix: use androidx

[anees17861]

A change was made to use android support. All modern projects should be migrated to androidx

[fabiendem]

Damn I was looking at the exact same issue at the same time.
Thanks for the fix!!
Hopefully it can be merged soon 🤞

[fabiendem]

Hi @manualexSP, any chance we can merge this PR please?

[manualexSP]

@fabiendem & @anees17861 Hey guys thank you for doing this. I will talk with my team and we will do some tests with this change to see how it works on our end and we will come back to you with an update :D

[fabiendem]

It should fix the following warnings while running jetify.

Jetifier found xxxx file(s) to forward-jetify. Using 10 workers...
Jetifier: propose an AndroidX conversion PR to this repository: node_modules/react-native-nordic-dfu/android/src/main/java/com/pilloxa/dfu/NotificationActivity.java
Jetifier: propose an AndroidX conversion PR to this repository: node_modules/react-native-nordic-dfu/android/src/main/java/com/pilloxa/dfu/RNNordicDfuModule.java