incognito property does not respond to false or null

[bobsmits]

Bug description:
When setting the incognito property to false or null the webview acts as if incognito is true. At least cookies are not remembered. When setting incognito to undefined it works as expected.

To Reproduce:

          <WebView
             source={{ uri: urlwithcookies }}
             sharedCookiesEnabled={true}
             incognito={false}
           />

Expected behavior:
When incognito is set to false or null it remembers my cookies.

Environment:

• OS: Tested on android
• OS version: -
• react-native version: 0.60.5
• react-native-webview version: 8.0.3

[bitsmanent]

I think the issue is here:

https://github.com/react-native-community/react-native-webview/blob/344aab591a920159bbec30f97b42bbb12573824b/android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManager.java#L401

The enabled flag is only partially implemented while all cookies, cache and form data are cleared regardless on this flag. Hope this helps.

[github-actions]

Hello 👋, this issue has been opened for more than 2 months with no activity on it. If the issue is still here, please keep in mind that we need community support and help to fix it! Just comment something like still searching for solutions and if you found one, please open a pull request! You have 7 days until this gets closed automatically

[pdandradeb]

I've created this PR #1465 to fix this issue.