fix: refocus after webview visible (#186)

[knight9999]

Platforms affected

android

Motivation and Context

After Android SDK 28, the android buck-button key event can not be handled.
This issue happens because the webview gets out of focus.
This PR made the webview to refocus after url loading.

fixes: #186

Description

Testing

In my local environment I tested by creating sample app with cordova-android 9.1.0 and cordova 10.0.0.
I also run npm run test.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[erisu]

LGTM

[5r1m]

@erisu, can you please share when the next release would be? This issue has been pending for a very long time. Thanks.

[nvkhanh]

@erisu I have the same issue with my android device (API 30)

can you release the new version for us