Changes:
- Added Android Library Module to android-test project.
- Added SourceSetUtils file with methods to check for android projects and retrieve source sets.
- Added unit test to GradleApiConnectorTest for android-test project.

… and implement retrieval in SourceSetUtils.

…et properties.

Changes:
- Added most of the android build target properties.
- Addressed checkstyle warnings
- Changed GradleSourceSet to store set of resource output directories instead of one directory.
- Removed temporary android testing methods.

Changes:
- Added JavaDocs to AndroidUtils
- Added SourceSetUtils for common utility methods for SourceSets.
- Removed common method declarations from AndroidUtils and SourceSetsModelBuilder into SourceSetUtils.

Changes:
- Removed unnecessary resource files from android-test project.
- Completed AndroidModelBuilder unit test in GradleApiConnectorTest.
- Suppressed and addressed minor warnings in DependencyCollector and SourceSetsModelBuilder.
- Removed classloader approach for retrieving artifact components in AndroidDependencyCollector.
- AndroidBuildVariant SourceSet now stores full task name for compileTask.
- AndroidSDK Jar is also added to AndroidBuildVariant SourceSet compileClasspath.

Changes:
- Fixed android test project.
- Added integration test to verify presence of android sdk component jar.
- Moved android sdk component and R file from classpath to module dependency of a build target.

Changes:
- Removed default proguard files from android-test project.
- Added a utility function for invocation of methods with reflection in AndroidUtils.

Changes:
- Added needed notes to Android tests.
- Removed unnecessary support dependency from android-test library project.

Changes:
- Moved supportedLanguageModelBuilders method from the ModelBuilder to AndroidUtils.
- Added JavaLanguageExtension to the android build target extensions property.