Support billing 5, multi-line subscriptions and API v2

[Stafox]

Google had announced the changes to the subscriptions: https://android-developers.googleblog.com/2022/05/new-ways-to-sell-subscriptions-on-google-play.html.html

Useful links:

• https://developers.google.com/android-publisher/api-ref/rest/v3/purchases.subscriptionsv2
• https://www.youtube.com/watch?v=d8mn0pmgvGw

[polcats]

+1 on this

[dcuillery]

+1

[Stafox]

Ability to work with v2 #171