Merge "Add a tagged output for app's exportPackage" am: 72ce814def am: 8dffd9e1aa

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1398474

Change-Id: If5e01ace3c68c775c86fd53dada0314611d246dc
diff --git a/java/app.go b/java/app.go
index e21dcc0..61946ef 100755
--- a/java/app.go
+++ b/java/app.go
@@ -993,6 +993,8 @@
 	switch tag {
 	case ".aapt.srcjar":
 		return []android.Path{a.aaptSrcJar}, nil
+	case ".export-package.apk":
+		return []android.Path{a.exportPackage}, nil
 	}
 	return a.Library.OutputFiles(tag)
 }