(android) Code improve

[flexaddicted]

Improve code formatting

Platforms affected

Android

Motivation and Context

The change is required to improve Java code.

Description

The change introduce the following changes:

• Replace the beforeload string with BEFORELOAD constant
• Add spaces curly braces

Testing

I've checked the changes in a sample app.

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

[NiklasMerz]

Code looks good to me. Since this is only code style, it should be fine?

Restarted tests and passed, quick manual test with https://github.com/dpa99c/cordova-plugin-inappbrowser-test on Android emulator was successful.

[flexaddicted]

Code looks good to me. Since this is only code style, it should be fine?

Restarted tests and passed, quick manual test with https://github.com/dpa99c/cordova-plugin-inappbrowser-test on Android emulator was successful.

I've also replaced "beforeload" string with BEFORELOAD constant. @NiklasMerz @erisu

[NiklasMerz]

@flexaddicted Thank you for your PR. I think this is a good change.

I would like to get one other review before merging this.

[timbru31]

LGTM