Take Module implementations out of java/java.go.

Test: TreeHugger
Change-Id: I5c39915ad2cadf5981c201a2b412916524d4c3e2
diff --git a/java/Android.bp b/java/Android.bp
index 9e2db83..a630f4b 100644
--- a/java/Android.bp
+++ b/java/Android.bp
@@ -28,6 +28,7 @@
         "app.go",
         "app_import.go",
         "app_set.go",
+        "base.go",
         "boot_image.go",
         "boot_jars.go",
         "builder.go",