Changing TextInput keyboardType from visible-password does not unset the underlying flags (Android) #17248

Is this a bug report?

Yes.

Have you read the Contributing Guidelines?

Yes.

Environment

Environment:
OS: macOS High Sierra 10.13.2
Node: 9.2.0
Yarn: 1.3.2
npm: 5.5.1
Watchman: 4.9.0
Xcode: Xcode 9.2 Build version 9C40b
Android Studio: 3.0 AI-171.4443003

Packages: (wanted => installed)
react: 16.0.0 => 16.0.0
react-native: facebook/react-native#master => 1000.0.0
(react-native built from master branch on 2017-12-17)

Target Platform: Android 8.x
Tested specifically on Nexus 5x, api level 27

Steps to Reproduce

1. Create a TextInput with secureTextEntry set and a keyboardType of null, undefined, or 'default'
2. Change the keyboardType to 'visible-password'
3. Change the keyboardType back to 'default'

Expected Behavior

The field would initially be an obscured password field, then become unobscured, then become obscured again when no longer of type 'visible-password'.
Additionally, the soft keyboard variant stays in "password" mode (e.g., no suggestions) in each case due to secureTextEntry.

Actual Behavior

After set to 'visible-password', the field remains unobscured even after switching to a different type.
However, when not obscured, the soft keyboard falls returns to a plain text keyboard with suggestions instead of numbers on the top row (may vary by device).

Reproducible Demo

I believe this branch should exhibit the bug out-of-the-box (after installing packages and building):
https://github.com/BrandonWilliamsCS/react-native-test-harness/tree/fix/android-textfield-keyboardtype-flags

Once running on an Android device or emulator, tap the field so that the soft keyboard appears and enter text into the field. This will trigger a state change that toggles between 'visible-password' and 'default'.