Added instructions in README file on how to set up the project in Android Studio

[anonymous-basenji]

Description

This pull request adds instructions to the README on how to set up and get the project running in Android Studio, in addition to a few common issues developers may run into with Gradle, along with a link to the Gradle Manual.

Fixes #(issue)

Type of change

Just put an x in the [] which are valid.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• ./gradlew assembleDebug assembleRelease
• ./gradlew checkstyle

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codeclimate]

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