Fix/app crash on double cancele google py go sell#65

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HumedMohammed wants to merge 2 commits intoTap-Payments:masterfrom

HumedMohammed:fix/app-crash-on-double-cancele-google-py-goSell

Commits on Dec 2, 2025

refactor: Comment out callback nullification in GoSellSdKDelegate
HumedMohammed
committed
fix: Improve error handling and null checks in GoSellSdKDelegate methods
HumedMohammed
committed