1.(Terminal) git svn clone http://svn.domain.com/svnroot/
2.(BitBucket) Create repository, get repository url
3.(Android Studio) Open project (cloned in step 1)
4.(Android Studio) Android Studio -> Preferences -> Version Control -> Change none/SVN to Git
5.(Android Studio) VCS -> Commit
6.(Android Studio Terminal) git remote add origin http://abc.com/def/ghi.git
The URL was what you got in step 2.
7.(Android Studio) VCS -> git -> Push