Create system_current clone of modules-utils-build

Some apks which need to use system_current sdk can't compile against
module_current.

Test: Treehugger
Bug: 178426097
Change-Id: Ie8b2c1b0bbefe564d275034e29d1ea1b4f9c7243
diff --git a/build/Android.bp b/build/Android.bp
index 941e1dc..6fab8b4 100644
--- a/build/Android.bp
+++ b/build/Android.bp
@@ -30,6 +30,19 @@
     ],
 }
 
+// For modules which use system sdk
+java_library {
+    name: "modules-utils-build_system",
+    srcs: ["src/**/*.java"],
+    sdk_version: "system_current",
+    min_sdk_version: "29",
+    visibility: ["//visibility:public"],
+    apex_available: [
+        "//apex_available:anyapex",
+        "//apex_available:platform",
+    ],
+}
+
 cc_library_static {
     name: "libmodules-utils-build",
     min_sdk_version: "29",