Refactored Gradle setup
Refactored Gradle setup

- moved safeExtGet to out of `buildscript` block, because it's no longer needed to be there (previously we needed it there for getting AGP version from root project)

- bumped AGP version to 3.5.3

- replace `${safeExtGet('reactnativeVersion', '+')}` with `+`, becase react-native version automatically resolved by npm and it does not need to handle using `safeExtGet`
magicismight/react-native-art-svg,magicismight/react-native-art-svg,magicismight/react-native-svg,magicismight/react-native-svg,magicismight/react-native-svg,react-native-community/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-svg,magicismight/react-native-svg,react-native-community/react-native-svg,react-native-community/react-native-svg,react-native-community/react-native-svg