[FEATURE]: Support Build Variant for project

[MrIkso]

Hello, i found limitations in current tooling api realization, we don't support flavour and don't have any variant to build this project types, only debug/release.

[itsaky]

For variants

We already have enough data about variants to allow the user to select which variant to build. We could get the list of variants from IdeAndroidModule. The SimpleArtifact in SimpleVariantData contains a field named assembleTaskName which is the task name that should be executed in order to build that variant.

For product flavors

Well, it will take some time to be implemented. It may or may not need changes in the tooling API implementation.