[CI] Update circle ci to 2.0 for faster reliable builds

[noorejannat]

Currently circle ci keeps failing.

https://circleci.com/gh/amardeshbd/android-daily-headlines/193

Refs:

• https://discuss.circleci.com/t/thank-you-and-android-build-example/11298
• https://medium.com/@thyrlian/migrating-circleci-1-2-for-android-77a63219d64c

[noorejannat]

This is blocking https://github.com/amardeshbd/android-daily-headlines/pull/196 from being merged.