Summary:
TextInput’s `InputAccessoryView` was using a [deprecated] prop-type as a Flow type, which TheSavior asked me to fix [here](https://github.com/alloy/rn2dts/commit/6ba4b28a22d8c0bd346996d78743016eaae707e1#r37343692).
## Changelog
[iOS] [Fixed] - Fixes the `InputAccessoryView.backgroundColor` prop’s typing to use `ColorValue`.
Pull Request resolved: https://github.com/facebook/react-native/pull/28105
Test Plan:
Passes:
```bash
yarn flow-check-ios
```
Differential Revision: D19956401
Pulled By: TheSavior
fbshipit-source-id: 0c16f292b0143e83235a23712a0a7a11b8317f4e