Clean res dir of Android project

Currently when creating Android project, we copy the full src directory from android framework. After that we execute `copyResValues` which is totally not needed as we've already copied everything. Instead we have to clean the copied values as currently if you target android sdk 19 for example, we'll still copy res/values-v21 directory in the project and the build will fail.
Check all `values-v<SDK>` directories and remove the ones that have higher version than currently targeted one.

Author: rosen-vladimirov

lib/services/android-project-service.ts

@@ -105,37 +105,29 @@ class AndroidProjectService extends projectServiceBaseLib.PlatformProjectService
 				this.copy(projectRoot, frameworkDir, "build.gradle settings.gradle", "-f");
 			}
 
-			this.copyResValues(projectRoot, frameworkDir, versionNumber).wait();
+			this.cleanResValues(versionNumber).wait();
 
 		}).future<any>()();
 	}
 
-	private copyResValues(projectRoot: string, frameworkDir: string, versionNumber: string): IFuture<void> {
+	private cleanResValues(versionNumber: string): IFuture<void> {
 		return (() => {
-			let resSourceDir = path.join(frameworkDir, "src", "main", "res");
 			let resDestinationDir = this.getAppResourcesDestinationDirectoryPath().wait();
-			this.$fs.createDirectory(resDestinationDir).wait();
-			let versionDirName = AndroidProjectService.VALUES_VERSION_DIRNAME_PREFIX + versionNumber;
-			let directoriesToCopy = [AndroidProjectService.VALUES_DIRNAME];
-			let directoriesInResFolder = this.$fs.readDirectory(resSourceDir).wait();
-			let integerFrameworkVersion = parseInt(versionNumber);
-			let versionDir = _.find(directoriesInResFolder, dir => dir === versionDirName) ||
-				_(directoriesInResFolder)
-				.map(dir => {
-					return {
+			let directoriesInResFolder = this.$fs.readDirectory(resDestinationDir).wait();
+ 			let integerFrameworkVersion = parseInt(versionNumber);
+			let directoriesToClean = directoriesInResFolder
+				.map(dir => { return {
 						dirName: dir,
 						sdkNum: parseInt(dir.substr(AndroidProjectService.VALUES_VERSION_DIRNAME_PREFIX.length))
 					};
 				})
-				.filter(dir => dir.dirName.match(AndroidProjectService.VALUES_VERSION_DIRNAME_PREFIX) && dir.sdkNum && (!integerFrameworkVersion || (integerFrameworkVersion >= dir.sdkNum)))
-				.max(dir => dir.sdkNum)
-				.dirName;
-
-			if(versionDir) {
-				directoriesToCopy.push(versionDir);
-			}
-
-			this.copy(resDestinationDir, resSourceDir, directoriesToCopy.join(" "), "-Rf");
+				.filter(dir => dir.dirName.match(AndroidProjectService.VALUES_VERSION_DIRNAME_PREFIX)
+								&& dir.sdkNum
+								&& (!integerFrameworkVersion || (integerFrameworkVersion < dir.sdkNum)))
+				.map(dir => path.join(resDestinationDir, dir.dirName));
+			this.$logger.trace("Directories to clean:");
+			this.$logger.trace(directoriesToClean);
+			Future.wait(_.map(directoriesToClean, dir => this.$fs.deleteDirectory(dir)));
 		}).future<void>()();
 	}