Foreground indicator fixed for VoIP notifications

[jlorente]

Foreground indicator fixed for VoIP notifications

Description

Foreground attribute in additionaData payload was always false for VoIP notifications. With this
fix, it takes the properly value.

Related Issue

#2368

How Has This Been Tested?

With Xcode 10.

Types of changes

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[jlorente]

I have seen the error in the tests, but I have not changed the js code.

[jlorente]

I have merged the latests commits of the repository and now the tests have passed.