Unity: Resolving Android Dependencies freeze. Cannot import any plug-in

Well...the problem was that my project folder had spaces in it. If it was Test App, it should have been TestApp. When I created my project in Unity (Its my first project) I neglected the name of the Project is used as the folder name too. I understood how the whole engine works inside out in hopeless attempts to fix it, but never did I suspect it was so simple.

Not sure if this will help or cause more issues -- as I will find out soon I guess, but if you already have Play Services package installed along with the Play Services Resolver that comes with it...when importing the AdMobs package make sure that you uncheck the Play Services Resolver before import since it is already installed. You can manage/update the Play Services Resolver from the Assets menu if needed I believe.

In ProjectSettings you can remove (I suggest rename) the AndroidResolverDependencies.xml then restart unity. I takes time but you can see jdk working, so wait and it fixes any problem.