Resolve issues with nativescript-mediafilepicker plugin

[VladimirAmiorkov]

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• All existing tests are passing
• Tests for the changes are included

What is the current behavior?

Android build fails if the nativescript-mediafilepicker plugin is also present in the project.

What is the new behavior?

Android build builds correctly if the nativescript-mediafilepicker plugin is also present in the project.

Fixes/Implements/Closes #[Issue Number].
#164