[Android] Migrate to Unified Push Provisioning Flow

[zfurtak]

Context

Google is deprecating the legacy push provisioning flow in favor of the Unified Android Push Provisioning API. Every app using push provisioning must migrate by the end of this year.
We need to update react-native-wallet to maintain compatibility.

Reference: Google docs

[germanflighel]

Hi! Don't mean to pressure, but is this upgrade planned to be started soon? Let me know if help may be needed!

[Skalakid]

Hello @germanflighel, I just started working on it. Should be available soon :D