Revert^2 "Remove java_sdk_library "magic""

This change removes the java_sdk_library to submodule calculus logic,
i.e. the "magic". The "magic" is no longer being used, as all existing
usages have been fixed to specify the submodule that it actually depends
on.

Test: m nothing --no-skip-soong-tests
Bug: 368144555
Change-Id: Ica0cb5a51d7a8192c2402c0c50ac35cb0b4df0a2
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 7daaca7..c3ffb46 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -268,10 +268,6 @@
 	return baseName + ".stubs.source" + scope.moduleSuffix
 }
 
-func (scope *apiScope) apiModuleName(baseName string) string {
-	return baseName + ".api" + scope.moduleSuffix
-}
-
 func (scope *apiScope) String() string {
 	return scope.name
 }
@@ -1082,21 +1078,6 @@
 	return nil
 }
 
-func (c *commonToSdkLibraryAndImport) selectHeaderJarsForSdkVersion(ctx android.BaseModuleContext, sdkVersion android.SdkSpec) android.Paths {
-
-	// If a specific numeric version has been requested then use prebuilt versions of the sdk.
-	if !sdkVersion.ApiLevel.IsPreview() {
-		return PrebuiltJars(ctx, c.module.RootLibraryName(), sdkVersion)
-	}
-
-	paths := c.selectScopePaths(ctx, sdkVersion.Kind)
-	if paths == nil {
-		return nil
-	}
-
-	return paths.stubsHeaderPath
-}
-
 // selectScopePaths returns the *scopePaths appropriate for the specific kind.
 //
 // If the module does not support the specific kind then it will return the *scopePaths for the
@@ -1263,12 +1244,6 @@
 type SdkLibraryDependency interface {
 	SdkLibraryComponentDependency
 
-	// Get the header jars appropriate for the supplied sdk_version.
-	//
-	// These are turbine generated jars so they only change if the externals of the
-	// class changes but it does not contain and implementation or JavaDoc.
-	SdkHeaderJars(ctx android.BaseModuleContext, sdkVersion android.SdkSpec) android.Paths
-
 	// SdkApiStubDexJar returns the dex jar for the stubs for the prebuilt
 	// java_sdk_library_import module. It is needed by the hiddenapi processing tool which
 	// processes dex files.
@@ -2232,72 +2207,6 @@
 	mctx.CreateModule(sdkLibraryXmlFactory, &props)
 }
 
-func PrebuiltJars(ctx android.BaseModuleContext, baseName string, s android.SdkSpec) android.Paths {
-	var ver android.ApiLevel
-	var kind android.SdkKind
-	if s.UsePrebuilt(ctx) {
-		ver = s.ApiLevel
-		kind = s.Kind
-	} else {
-		// We don't have prebuilt SDK for the specific sdkVersion.
-		// Instead of breaking the build, fallback to use "system_current"
-		ver = android.FutureApiLevel
-		kind = android.SdkSystem
-	}
-
-	dir := filepath.Join("prebuilts", "sdk", ver.String(), kind.String())
-	jar := filepath.Join(dir, baseName+".jar")
-	jarPath := android.ExistentPathForSource(ctx, jar)
-	if !jarPath.Valid() {
-		if ctx.Config().AllowMissingDependencies() {
-			return android.Paths{android.PathForSource(ctx, jar)}
-		} else {
-			ctx.PropertyErrorf("sdk_library", "invalid sdk version %q, %q does not exist", s.Raw, jar)
-		}
-		return nil
-	}
-	return android.Paths{jarPath.Path()}
-}
-
-// Check to see if the other module is within the same set of named APEXes as this module.
-//
-// If either this or the other module are on the platform then this will return
-// false.
-func withinSameApexesAs(ctx android.BaseModuleContext, other android.Module) bool {
-	apexInfo, _ := android.ModuleProvider(ctx, android.ApexInfoProvider)
-	otherApexInfo, _ := android.OtherModuleProvider(ctx, other, android.ApexInfoProvider)
-	return len(otherApexInfo.InApexVariants) > 0 && reflect.DeepEqual(apexInfo.InApexVariants, otherApexInfo.InApexVariants)
-}
-
-func (module *SdkLibrary) sdkJars(ctx android.BaseModuleContext, sdkVersion android.SdkSpec) android.Paths {
-	// If the client doesn't set sdk_version, but if this library prefers stubs over
-	// the impl library, let's provide the widest API surface possible. To do so,
-	// force override sdk_version to module_current so that the closest possible API
-	// surface could be found in selectHeaderJarsForSdkVersion
-	if module.defaultsToStubs() && !sdkVersion.Specified() {
-		sdkVersion = android.SdkSpecFrom(ctx, "module_current")
-	}
-
-	// Only provide access to the implementation library if it is actually built.
-	if module.requiresRuntimeImplementationLibrary() {
-		// Check any special cases for java_sdk_library.
-		//
-		// Only allow access to the implementation library in the following condition:
-		// * No sdk_version specified on the referencing module.
-		// * The referencing module is in the same apex as this.
-		if sdkVersion.Kind == android.SdkPrivate || withinSameApexesAs(ctx, module) {
-			return module.implLibraryHeaderJars
-		}
-	}
-
-	return module.selectHeaderJarsForSdkVersion(ctx, sdkVersion)
-}
-
-// to satisfy SdkLibraryDependency interface
-func (module *SdkLibrary) SdkHeaderJars(ctx android.BaseModuleContext, sdkVersion android.SdkSpec) android.Paths {
-	return module.sdkJars(ctx, sdkVersion)
-}
-
 var javaSdkLibrariesKey = android.NewOnceKey("javaSdkLibraries")
 
 func javaSdkLibraries(config android.Config) *[]string {
@@ -2416,10 +2325,6 @@
 	return !proptools.Bool(module.sdkLibraryProperties.Api_only)
 }
 
-func (module *SdkLibrary) defaultsToStubs() bool {
-	return proptools.Bool(module.sdkLibraryProperties.Default_to_stubs)
-}
-
 func moduleStubLinkType(j *Module) (stub bool, ret sdkLinkType) {
 	kind := android.ToSdkKind(proptools.String(j.properties.Stub_contributing_api))
 	switch kind {
@@ -2921,28 +2826,6 @@
 	})
 }
 
-func (module *SdkLibraryImport) sdkJars(ctx android.BaseModuleContext, sdkVersion android.SdkSpec, headerJars bool) android.Paths {
-
-	// For consistency with SdkLibrary make the implementation jar available to libraries that
-	// are within the same APEX.
-	implLibraryModule := module.implLibraryModule
-	if implLibraryModule != nil && withinSameApexesAs(ctx, module) {
-		if headerJars {
-			return implLibraryModule.HeaderJars()
-		} else {
-			return implLibraryModule.ImplementationJars()
-		}
-	}
-
-	return module.selectHeaderJarsForSdkVersion(ctx, sdkVersion)
-}
-
-// to satisfy SdkLibraryDependency interface
-func (module *SdkLibraryImport) SdkHeaderJars(ctx android.BaseModuleContext, sdkVersion android.SdkSpec) android.Paths {
-	// This module is just a wrapper for the prebuilt stubs.
-	return module.sdkJars(ctx, sdkVersion, true)
-}
-
 // to satisfy UsesLibraryDependency interface
 func (module *SdkLibraryImport) DexJarBuildPath(ctx android.ModuleErrorfContext) OptionalDexJarPath {
 	// The dex implementation jar extracted from the .apex file should be used in preference to the