Bump android-maven-gradle-plugin from 1.4.1 to 2.1
Bump android-maven-gradle-plugin from 1.4.1 to 2.1

Bumps [android-maven-gradle-plugin](https://github.com/dcendents/android-maven-gradle-plugin) from 1.4.1 to 2.1.
- [Release notes](https://github.com/dcendents/android-maven-gradle-plugin/releases)
- [Commits](https://github.com/dcendents/android-maven-gradle-plugin/compare/1.4.1...2.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
rm3l/now4j