trackColor.false doesn't persist when Android Switch component is toggled

[shaundon]

🐛 Bug Report

**Note: ** This is related to #23956. I expect the same thing is causing both issues.

The switch component has a trackColor prop with true and false props within, to change the colour of the track when the switch is enabled and disabled respectively.

When trackColor.false is set, it works initially but then reverts to the original grey colour when the switch is toggled on then off.

To Reproduce

1. Use trackColor.false on a Switch component on Android.
2. Toggle the switch on then off.
3. The track colour reverts to grey from the colour you set.

Expected Behavior

The colour to not be reverted when the switch is toggled.

Code Example

<Switch 
    thumbColor="red" 
    trackColor={{
        true: "yellow",
        false: "purple",
    }} 
/>

Here's a test repo I made to showcase the issue: https://github.com/shaundon/switchdemo

Environment

  React Native Environment Info:
    System:
      OS: macOS 10.14.1
      CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
      Memory: 91.06 MB / 16.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 10.13.0 - ~/.nvm/versions/node/v10.13.0/bin/node
      Yarn: 1.13.0 - /usr/local/bin/yarn
      npm: 6.4.1 - ~/.nvm/versions/node/v10.13.0/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
      Android SDK:
        API Levels: 21, 23, 24, 25, 26, 27, 28
        Build Tools: 23.0.1, 25.0.0, 26.0.1, 26.0.2, 27.0.3, 28.0.3
        System Images: android-21 | Google APIs Intel x86 Atom, android-24 | Google APIs Intel x86 Atom, android-27 | Google APIs Intel x86 Atom, android-27 | Google Play Intel x86 Atom, android-28 | Google Play Intel x86 Atom
    IDEs:
      Android Studio: 3.3 AI-182.5107.16.33.5314842
      Xcode: 10.1/10B61 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.8.3 => 16.8.3
      react-native: 0.59.1 => 0.59.1
    npmGlobalPackages:
      create-react-native-app: 2.0.2
      react-native-cli: 2.0.1

[JKCooper2]

Not reproducible in older versions of RN (https://snack.expo.io/@jkcooper/rn23962-switch-track-color) so may be a newly introduced bug