Add module_prebuilt_systemserverclasspath_fragment.

Bug: 194150908
Test: Presubmits
Merged-In: I9f3e46966d6672cceb864be48301c7a63777563b
Merged-In: I14455d0ca153139842224cf489965173d0d6491a
Change-Id: I9f3e46966d6672cceb864be48301c7a63777563b
(cherry picked from commit b152a49229)

Android.bp

@@ -61,6 +61,16 @@ soong_config_module_type {
     ],
 }
 
+soong_config_module_type {
+    name: "module_prebuilt_systemserverclasspath_fragment",
+    module_type: "prebuilt_systemserverclasspath_fragment",
+    config_namespace: "ANDROID",
+    bool_variables: ["module_build_from_source"],
+    properties: [
+        "prefer",
+    ],
+}
+
 soong_config_module_type {
     name: "module_java_import",
     module_type: "java_import",