Only generate local maven repo for .srcaar

If the repo specified in Dependencies.xml contains .aar, there is
no need to generate local maven repo for them but just need to
inject repo to mainTemplate.gradle using the original path.

Change-Id: Ibbf66f2a505c633376c453ed4db989372b3f7384

Author: chkuang-g

source/AndroidResolver/src/GradleTemplateResolver.cs

@@ -95,6 +95,11 @@ private static bool CopySrcAars(ICollection<Dependency> dependencies) {
             // Copy each .srcaar file to .aar while configuring the plugin importer to ignore the
             // file.
             foreach (var aar in LocalMavenRepository.FindAarsInLocalRepos(dependencies)) {
+                // Only need to copy for .srcaar
+                if (Path.GetExtension(aar).CompareTo(".srcaar") != 0) {
+                    continue;
+                }
+
                 var aarPath = aar;
                 if (FileUtils.IsUnderPackageDirectory(aar)) {
                     var logicalPackagePath = FileUtils.GetPackageDirectory(aar,

source/AndroidResolver/src/PlayServicesResolver.cs

@@ -2000,10 +2000,17 @@ internal static IList<string> GradleMavenReposLines(ICollection<Dependency> depe
                 foreach (var repoAndSources in GetRepos(dependencies: dependencies)) {
                     string repoUri;
                     if (repoAndSources.Key.StartsWith(projectFileUri)) {
-                        var repoPath = repoAndSources.Key.Substring(projectFileUri.Length + 1);
-                        repoPath = FileUtils.PosixPathSeparators(
+                        var relativePath = repoAndSources.Key.Substring(projectFileUri.Length + 1);
+                        // Convert "Assets", "Packages/packageid", or
+                        // "Library/PackageCache/packageid@version" prefix to local maven repo
+                        // path.  Note that local maven repo path only exists if the original repo
+                        // path contains .srcaar.
+                        var repoPath = FileUtils.PosixPathSeparators(
                             FileUtils.ReplaceBaseAssetsOrPackagesFolder(
-                                repoPath, GooglePlayServices.SettingsDialog.LocalMavenRepoDir));
+                                relativePath, GooglePlayServices.SettingsDialog.LocalMavenRepoDir));
+                        if (!Directory.Exists(repoPath)) {
+                            repoPath = relativePath;
+                        }
 
                         // If "Export Gradle Project" setting is enabled, gradle project expects
                         // absolute path.