Honor resource exclusions in java_resources properties

Honor the default resource exclusions in java_resources properties
including *.java.

Test: m -j checkbuild
Change-Id: Ia117a000680161b54c189758926ddb2068a2a2c3
diff --git a/java/resources.go b/java/resources.go
index 85ebd52..d552428 100644
--- a/java/resources.go
+++ b/java/resources.go
@@ -75,8 +75,27 @@
 	return args, deps
 }
 
+// Convert java_resources properties to arguments to soong_zip -jar, ignoring common patterns
+// that should not be treated as resources (including *.java).
 func ResourceFilesToJarArgs(ctx android.ModuleContext,
 	res, exclude []string) (args []string, deps android.Paths) {
+
+	exclude = append([]string(nil), exclude...)
+	exclude = append(exclude, resourceExcludes...)
+	return resourceFilesToJarArgs(ctx, res, exclude)
+}
+
+// Convert java_resources properties to arguments to soong_zip -jar, keeping files that should
+// normally not used as resources like *.java
+func SourceFilesToJarArgs(ctx android.ModuleContext,
+	res, exclude []string) (args []string, deps android.Paths) {
+
+	return resourceFilesToJarArgs(ctx, res, exclude)
+}
+
+func resourceFilesToJarArgs(ctx android.ModuleContext,
+	res, exclude []string) (args []string, deps android.Paths) {
+
 	files := ctx.ExpandSources(res, exclude)
 
 	for _, f := range files {