sdk_version: "system_server_current"

The new sdk version "system_server_current" is for system server
components that needs to use all public APIs, system APIs, module APIs,
and the system server APIs.

Bug: 146757305
Test: m
Change-Id: I24fd5af010532a110393676607dc90889f2ec17e

java/testing.go

@@ -147,6 +147,7 @@ func GatherRequiredDepsForTest() string {
 		"android_system_stubs_current",
 		"android_test_stubs_current",
 		"android_module_lib_stubs_current",
+		"services-stubs",
 		"core.current.stubs",
 		"core.platform.api.stubs",
 		"kotlin-stdlib",