I modified some code and added few (minor) changes to an open source Android app. Now I want to publish it on play store. The app is licensed under Apache license v2. The license file is included in the project but there is no name of the author on it. It is just an Apache terms and conditions file nothing else.
There is no copyright note anywhere in the project. What should I do? Should I publish it without the license? I can get the name of the author by visiting his profile (the project is on GitHub). Should I add a copyright notice in code?