Make system_server stubs consistent with other stubs

Include the module_api stubs in system_server one instead of
putting both of these jars on the classpath. Also rename it
to be in line with the other stubs.

Bug: 149293194
Test: m
Change-Id: I2a9318c8ae036edafac086687601fa73d9bf4678
Merged-In: I2a9318c8ae036edafac086687601fa73d9bf4678
(cherry picked from commit a49fb99d)

services/Android.bp

@@ -138,7 +138,8 @@ droidstubs {
 }
 
 java_library {
-    name: "services-stubs",
+    name: "android_system_server_stubs_current",
     srcs: [":services-stubs.sources"],
     installable: false,
+    static_libs: ["android_module_lib_stubs_current"],
 }