TextInput does not have rounded corners when "borderRadius" style is used

[jagorrin]

Environment

1. react-native -v:
   react-native-cli: 2.0.1
   react-native: 0.60.6
2. npm ls rnpm-plugin-windows:
   rnpm-plugin-windows@0.3.5
3. npm ls react-native-windows:
   react-native-windows@0.60.0-vnext.39
4. node -v:
   v10.15.0
5. npm -v:
   6.13.1

Then, specify:

• Target Platform Version(s): 10.0.18362.0

• Target Device(s): Desktop

• Visual Studio Version: 2017

• Build Configuration: Debug

Steps to Reproduce

1. Create a TextInput in a project using React Native Windows
2. Apply a style containing "borderRadius"
3. Observe that the TextInput does not have rounded corners

Example code:

import { TextInput, StyleSheet } from "react-native";

const styleSheet = StyleSheet.create({
    roundedCorners: {
        borderRadius: 16,
    },
});

render() {
    return <TextInput style={styleSheet.roundedCorners} />;
}

Expected Behavior

I expected the TextInput to have rounded corners using the supplied border radius.

Actual Behavior

Applying the "borderRadius" style did not visually change the box. It still has rounded corners.

Screenshot:

[kmelmon]

Another issue with rounded corners similar to #3456.

[ddalp]

Fixed for RS5 plus.