fix: platform constants is undefined on web

[mnahkies]

Motivation

in #4246 a check based on react native version was introduced, however the Platform.constants property is undefined when targetting web using the react-native-web approach listed in the docs, as the platform object is simply:

{"OS":"web","isTesting":false}

adjust it to check if the OS is web and use the native driver as before if so.

whilst I'm not totally sure whether using the "native driver" is the best option on web, until #4246 this was the case, so seemed the best option to revert to.

Interim Workaround

In the meantime, rather than monkey patching react-native-paper I'm working around by monkey patching the constants like so:

// TODO: workaround for react-native-paper issue
//       https://github.com/callstack/react-native-paper/pull/4257
if (!Platform.constants) {
  Platform.constants = {
    isTesting: Platform.isTesting,
    reactNativeVersion: {major: 0, minor: 73, patch: 0},
  }
}

I'm using expo-router so have placed this in my general app initialization effect in the root layout.

Test plan

Before this change, I encounter this error:

Afterwards the error is gone, and the buttons look correct to my eyes.

[callstack-bot]

Hey @mnahkies, thank you for your pull request 🤗. The documentation from this branch can be viewed here.