getUserAgentSync: fix memoKey

[kesha-antonov]

Description

Fixes getUserAgent returning unknown when used with the getUserAgentSync

For example,

  let userAgent = '' + Platform.select({
    android: DeviceInfo.getUserAgentSync(), // sync not supported by iOS - supportedPlatforms: ['android', 'web']
    default: await DeviceInfo.getUserAgent(),
  })

On ios it will return unknown

The reason:

getUserAgent and getUserAgent have same memoKey

https://github.com/react-native-device-info/react-native-device-info/blob/master/src/index.ts#L228
https://github.com/react-native-device-info/react-native-device-info/blob/master/src/index.ts#L236

Compatibility

OS	Implemented
iOS	✅
Android	✅
Windows	✅

Checklist

• I have tested this on a device/simulator for each compatible OS
• I added the documentation in README.md
• I updated the typings files (privateTypes.ts, types.ts)
• I added a sample use of the API (example/App.js)

[mikehardy]

interesting! This API (getUserAgent) is a corner case in so many ways, the change here seems like it is in tune with how it works though, thank you

[rndi-bot]

🎉 This PR is included in version 10.3.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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