CB-13123 : plugin add should use cordovaDependency instead

[audreyso]

of plugin.xml engine tag

Platforms affected

What does this PR do?

plugin add/ install should use cordovaDependency instead of plugin.xml engine tag

What testing has been done on this change?

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[stevengill]

This is not going to make next release, getting bumped for now

[janpio]

Next to failing tests this PR now also has conflicts. Could you please rebase on master @audreyso and fix those? Then we can take another look at those test failures. Thank you.