Use module_current to build module stubs

module_current is always built from sources, whereas the
other SDK jars are being transitioned to be composed of
a set of stubs. This avoids the dependency cycle of module
stubs depending on themselves.

Bug: 144149403
Test: m
Change-Id: I31c6d0fa958aa502131352716a9f950828b7829c

apex/Android.bp

@@ -67,7 +67,7 @@ stubs_defaults {
     name: "framework-module-stubs-defaults-publicapi",
     args: mainline_framework_stubs_args,
     installable: false,
-    sdk_version: "current",
+    sdk_version: "module_current",
     filter_packages: framework_packages_to_document,
     check_api: {
         current: {
@@ -86,7 +86,7 @@ stubs_defaults {
     args: mainline_framework_stubs_args + priv_apps,
     libs: ["framework-annotations-lib"],
     installable: false,
-    sdk_version: "system_current",
+    sdk_version: "module_current",
     filter_packages: framework_packages_to_document,
     check_api: {
         current: {