Split the core/platform API into stable and legacy versions.

For now, everything outside libcore still uses the legacy version.

Test: treehugger
Bug: 157640067
Change-Id: If5234e9ee533ff537926801a0af045d36b1caf01
diff --git a/sdk/java_sdk_test.go b/sdk/java_sdk_test.go
index af792f2..56706c7 100644
--- a/sdk/java_sdk_test.go
+++ b/sdk/java_sdk_test.go
@@ -43,10 +43,10 @@
 	name: "core-current-stubs-system-modules",
 }
 java_system_modules_import {
-	name: "core-platform-api-stubs-system-modules",
+	name: "legacy-core-platform-api-stubs-system-modules",
 }
 java_import {
-	name: "core.platform.api.stubs",
+	name: "legacy.core.platform.api.stubs",
 }
 java_import {
 	name: "android_stubs_current",