makes plugin support Android V2 embedding#10

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enolcasielles wants to merge 3 commits intovico-aguado:masterfrom enolcasielles:master

+148-74

Commits on Nov 4, 2021

makes plugin support Android V2 embedding
enolcasielles
committed

Commits on Apr 21, 2022

migrate to null-safety
enolcasielles
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Commits on May 4, 2022

remove deprecated registerWith static method in FlutterWalletPlgin java class
enolcasielles
committed