Rename core stubs to .txt stubs if applicable

In scope:
- core.current.stubs
- system modules generated for core's public stubs
- system modules generated for core's module_lib stubs

The system modules generated for core_platform api surface will be
handled in aosp/2514755

Test: go build ./java
Change-Id: I34134f79c8ae6e5b218d0b85553de5a748a8cc3f
diff --git a/java/base.go b/java/base.go
index 1bcff2e..9911323 100644
--- a/java/base.go
+++ b/java/base.go
@@ -1923,7 +1923,7 @@
 
 func (m *Module) getSdkLinkType(ctx android.BaseModuleContext, name string) (ret sdkLinkType, stubs bool) {
 	switch name {
-	case "core.current.stubs", "legacy.core.platform.api.stubs", "stable.core.platform.api.stubs",
+	case android.SdkCore.JavaLibraryName(ctx.Config()), "legacy.core.platform.api.stubs", "stable.core.platform.api.stubs",
 		"stub-annotations", "private-stub-annotations-jar",
 		"core-lambda-stubs", "core-generated-annotation-stubs":
 		return javaCore, true
diff --git a/java/sdk.go b/java/sdk.go
index 72a5006..1b18ba4 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -148,10 +148,11 @@
 	toModule := func(module string, aidl android.Path) sdkDep {
 		// Select the kind of system modules needed for the sdk version.
 		systemModulesKind := systemModuleKind(sdkVersion.Kind, android.FutureApiLevel)
+		systemModules := android.JavaApiLibraryName(ctx.Config(), fmt.Sprintf("core-%s-stubs-system-modules", systemModulesKind))
 		return sdkDep{
 			useModule:          true,
 			bootclasspath:      []string{module, config.DefaultLambdaStubsLibrary},
-			systemModules:      fmt.Sprintf("core-%s-stubs-system-modules", systemModulesKind),
+			systemModules:      systemModules,
 			java9Classpath:     []string{module},
 			frameworkResModule: "framework-res",
 			aidl:               android.OptionalPathForPath(aidl),
@@ -196,8 +197,8 @@
 	case android.SdkCore:
 		return sdkDep{
 			useModule:        true,
-			bootclasspath:    []string{"core.current.stubs", config.DefaultLambdaStubsLibrary},
-			systemModules:    "core-public-stubs-system-modules",
+			bootclasspath:    []string{android.SdkCore.JavaLibraryName(ctx.Config()), config.DefaultLambdaStubsLibrary},
+			systemModules:    android.JavaApiLibraryName(ctx.Config(), "core-public-stubs-system-modules"),
 			noFrameworksLibs: true,
 		}
 	case android.SdkModule: