updated android-maven-plugin till 3.8.0 version (require maven 3.1.1 and above)
platform.version updated till 4.1.1.4 better to use newer platforms
added possibility to skip coverage reports generation
platform changed to 18
Merge pull request #5 from TeamPanicButton/fixing_build_for_maven_3_1_1

Fixing build for maven 3 1 1