Updated Readme with up-to-date information (#4)
Updated Readme with up-to-date information (#4)

This pull request includes the following changes:

* Updated build requirements.
* Updated instructions about how to configure the project.
* Replaced bulleted lists with ordered lists in procedures.
* Fixed issue with screenshot.
* Updated copyright year and entity name in license section.
* Copy-edit and formatting pass.
GoogleCloudPlatform/firebase-android-client,GoogleCloudPlatform/firebase-android-client