Plugin cannot be used if "com.android.tools.build:gradle" is not explicitly defined in root gradle file

[mkopec87]

VariantProcessor explicitly checks buildscript dependencies to find android build tools version:

fat-aar-android/source/src/main/groovy/com/kezong/fataar/VariantProcessor.groovy

Line 42 in 485f4b7

mProject.rootProject.buildscript.getConfigurations().getByName("classpath").getDependencies().each { Dependency dep ->

In my project, however, I don't define android build tools explicitly, but via a plugin.

It would be more robust to somehow search for android build tools dependency as a possibly transitive buildscript dependency.

I can see I have "com.android.tools.build:gradle" buildscript dependency, it's just not a top-level dependency, but a transitive one (I checked it via 'gradle buildEnvironment' task).