[network_info_plus] Migrate Android part to Kotlin

[vbuberen]

Description

Continue migration of Plus Plugins Android parts to Kotlin. As in #666 tried did manual migration and did minor changes preserving existing behavior. As a side-effect fixed issue with getWifiBroadcast() to not return redundant / in front.

Also modernised the project to use latest Android dependencies and bumped targetSDK and compileSDK to 33. There were no network related changes between 31 and 33, so nothing breaking expected.

Related Issues

Closes #925
Closes #614

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Breaking Change

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[miquelbeltran]

Thanks! looks super clean now

[vbuberen]

After finishing with other plugins going to get back to this one as we are using some deprecated things in this plugin.