Merge changes from topic "revert-2929615-JHGJGJFRRX" into main

* changes:
  Revert "Additional cleanup prior to adding the runtime stubs"
  Revert "Generate runtime stubs in droidstubs"
diff --git a/java/droiddoc.go b/java/droiddoc.go
index df40d01..6a66f45 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -222,8 +222,6 @@
 	stubsSrcJar android.WritablePath
 
 	exportableStubsSrcJar android.WritablePath
-
-	runtimeStubsSrcJar android.WritablePath
 }
 
 func (j *Javadoc) OutputFiles(tag string) (android.Paths, error) {
diff --git a/java/droidstubs.go b/java/droidstubs.go
index f4bcaca..76c8d88 100644
--- a/java/droidstubs.go
+++ b/java/droidstubs.go
@@ -227,7 +227,6 @@
 type annotationFlagsParams struct {
 	migratingNullability    bool
 	validatingNullability   bool
-	extractAnnotations      bool
 	nullabilityWarningsFile android.WritablePath
 	annotationsZip          android.WritablePath
 }
@@ -243,19 +242,16 @@
 	stubConfig              stubsCommandConfigParams
 }
 type stubsCommandConfigParams struct {
-	stubsType                   StubsType
-	javaVersion                 javaVersion
-	deps                        deps
-	checkApi                    bool
-	generateStubs               bool
-	doApiLint                   bool
-	doCheckReleased             bool
-	writeSdkValues              bool
-	migratingNullability        bool
-	validatingNullability       bool
-	annotationsEnabled          bool
-	apiLevelsAnnotationsEnabled bool
-	extractAnnotations          bool
+	stubsType             StubsType
+	javaVersion           javaVersion
+	deps                  deps
+	checkApi              bool
+	generateStubs         bool
+	doApiLint             bool
+	doCheckReleased       bool
+	writeSdkValues        bool
+	migratingNullability  bool
+	validatingNullability bool
 }
 
 // droidstubs passes sources files through Metalava to generate stub .java files that only contain the API to be
@@ -525,30 +521,30 @@
 }
 
 func (d *Droidstubs) annotationsFlags(ctx android.ModuleContext, cmd *android.RuleBuilderCommand, params annotationFlagsParams) {
-	cmd.Flag(config.MetalavaAnnotationsFlags)
+	if Bool(d.properties.Annotations_enabled) {
+		cmd.Flag(config.MetalavaAnnotationsFlags)
 
-	if params.migratingNullability {
-		previousApi := android.PathForModuleSrc(ctx, String(d.properties.Previous_api))
-		cmd.FlagWithInput("--migrate-nullness ", previousApi)
-	}
+		if params.migratingNullability {
+			previousApi := android.PathForModuleSrc(ctx, String(d.properties.Previous_api))
+			cmd.FlagWithInput("--migrate-nullness ", previousApi)
+		}
 
-	if s := String(d.properties.Validate_nullability_from_list); s != "" {
-		cmd.FlagWithInput("--validate-nullability-from-list ", android.PathForModuleSrc(ctx, s))
-	}
+		if s := String(d.properties.Validate_nullability_from_list); s != "" {
+			cmd.FlagWithInput("--validate-nullability-from-list ", android.PathForModuleSrc(ctx, s))
+		}
 
-	if params.validatingNullability {
-		cmd.FlagWithOutput("--nullability-warnings-txt ", params.nullabilityWarningsFile)
-	}
+		if params.validatingNullability {
+			cmd.FlagWithOutput("--nullability-warnings-txt ", params.nullabilityWarningsFile)
+		}
 
-	if params.extractAnnotations {
 		cmd.FlagWithOutput("--extract-annotations ", params.annotationsZip)
-	}
 
-	if len(d.properties.Merge_annotations_dirs) != 0 {
-		d.mergeAnnoDirFlags(ctx, cmd)
-	}
+		if len(d.properties.Merge_annotations_dirs) != 0 {
+			d.mergeAnnoDirFlags(ctx, cmd)
+		}
 
-	cmd.Flag(config.MetalavaAnnotationsWarningsFlags)
+		cmd.Flag(config.MetalavaAnnotationsWarningsFlags)
+	}
 }
 
 func (d *Droidstubs) mergeAnnoDirFlags(ctx android.ModuleContext, cmd *android.RuleBuilderCommand) {
@@ -573,11 +569,9 @@
 	})
 }
 
-func (d *Droidstubs) apiLevelsAnnotationsFlags(ctx android.ModuleContext, cmd *android.RuleBuilderCommand, params stubsCommandParams) {
+func (d *Droidstubs) apiLevelsAnnotationsFlags(ctx android.ModuleContext, cmd *android.RuleBuilderCommand, stubsType StubsType, apiVersionsXml android.WritablePath) {
 	var apiVersions android.Path
-	stubsType := params.stubConfig.stubsType
-	apiVersionsXml := params.apiVersionsXml
-	if params.stubConfig.apiLevelsAnnotationsEnabled {
+	if proptools.Bool(d.properties.Api_levels_annotations_enabled) {
 		d.apiLevelsGenerationFlags(ctx, cmd, stubsType, apiVersionsXml)
 		apiVersions = apiVersionsXml
 	} else {
@@ -588,9 +582,7 @@
 				} else if stubsType == Exportable {
 					apiVersions = s.exportableArtifacts.apiVersionsXml
 				} else {
-					// if the stubs type does not generate api-versions.xml file, default to using the
-					// everything artifacts
-					apiVersions = s.everythingArtifacts.apiVersionsXml
+					ctx.ModuleErrorf("%s stubs type does not generate api-versions.xml file", stubsType.String())
 				}
 			} else {
 				ctx.PropertyErrorf("api_levels_module",
@@ -824,16 +816,13 @@
 	annotationParams := annotationFlagsParams{
 		migratingNullability:    params.stubConfig.migratingNullability,
 		validatingNullability:   params.stubConfig.validatingNullability,
-		extractAnnotations:      params.stubConfig.extractAnnotations,
 		nullabilityWarningsFile: params.nullabilityWarningsFile,
 		annotationsZip:          params.annotationsZip,
 	}
 
-	if params.stubConfig.annotationsEnabled {
-		d.annotationsFlags(ctx, cmd, annotationParams)
-	}
+	d.annotationsFlags(ctx, cmd, annotationParams)
 	d.inclusionAnnotationsFlags(ctx, cmd)
-	d.apiLevelsAnnotationsFlags(ctx, cmd, params)
+	d.apiLevelsAnnotationsFlags(ctx, cmd, params.stubConfig.stubsType, params.apiVersionsXml)
 
 	d.expandArgs(ctx, cmd)
 
@@ -863,13 +852,13 @@
 		d.everythingArtifacts.metadataZip = android.PathForModuleOut(ctx, Everything.String(), ctx.ModuleName()+"-metadata.zip")
 	}
 
-	if params.annotationsEnabled {
+	if Bool(d.properties.Annotations_enabled) {
 		if params.validatingNullability {
 			d.everythingArtifacts.nullabilityWarningsFile = android.PathForModuleOut(ctx, Everything.String(), ctx.ModuleName()+"_nullability_warnings.txt")
 		}
 		d.everythingArtifacts.annotationsZip = android.PathForModuleOut(ctx, Everything.String(), ctx.ModuleName()+"_annotations.zip")
 	}
-	if params.apiLevelsAnnotationsEnabled {
+	if Bool(d.properties.Api_levels_annotations_enabled) {
 		d.everythingArtifacts.apiVersionsXml = android.PathForModuleOut(ctx, Everything.String(), "api-versions.xml")
 	}
 
@@ -1047,7 +1036,7 @@
 		optionalCmdParams.metadataDir = d.exportableArtifacts.metadataDir
 	}
 
-	if params.annotationsEnabled {
+	if Bool(d.properties.Annotations_enabled) {
 		if params.validatingNullability {
 			d.exportableArtifacts.nullabilityWarningsFile = android.PathForModuleOut(ctx, params.stubsType.String(), ctx.ModuleName()+"_nullability_warnings.txt")
 			optionalCmdParams.nullabilityWarningsFile = d.exportableArtifacts.nullabilityWarningsFile
@@ -1055,7 +1044,7 @@
 		d.exportableArtifacts.annotationsZip = android.PathForModuleOut(ctx, params.stubsType.String(), ctx.ModuleName()+"_annotations.zip")
 		optionalCmdParams.annotationsZip = d.exportableArtifacts.annotationsZip
 	}
-	if params.apiLevelsAnnotationsEnabled {
+	if Bool(d.properties.Api_levels_annotations_enabled) {
 		d.exportableArtifacts.apiVersionsXml = android.PathForModuleOut(ctx, params.stubsType.String(), "api-versions.xml")
 		optionalCmdParams.apiVersionsXml = d.exportableArtifacts.apiVersionsXml
 	}
@@ -1073,38 +1062,6 @@
 	d.optionalStubCmd(ctx, optionalCmdParams)
 }
 
-// Sandbox rule for generating runtime stubs
-func (d *Droidstubs) runtimeStubCmd(ctx android.ModuleContext, params stubsCommandConfigParams) {
-
-	// We are only interested in generating the stubs srcjar,
-	// not other artifacts for the runtime stubs
-	params.checkApi = false
-	params.writeSdkValues = false
-	params.validatingNullability = false
-	params.extractAnnotations = false
-	params.apiLevelsAnnotationsEnabled = false
-
-	optionalCmdParams := stubsCommandParams{
-		stubConfig: params,
-	}
-
-	d.Javadoc.runtimeStubsSrcJar = android.PathForModuleOut(ctx, params.stubsType.String(), ctx.ModuleName()+"-"+"stubs.srcjar")
-	optionalCmdParams.stubsSrcJar = d.Javadoc.runtimeStubsSrcJar
-
-	// If aconfig_declarations property is not defined, all flagged apis symbols are stripped
-	// as no aconfig flags are enabled. In such case, the runtime stubs are identical to the
-	// exportable stubs, thus no additional metalava invocation is needed.
-	if len(d.properties.Aconfig_declarations) == 0 {
-		rule := android.NewRuleBuilder(pctx, ctx)
-		rule.Command().
-			Text("cp").Flag("-f").
-			Input(d.exportableStubsSrcJar).Output(d.runtimeStubsSrcJar)
-		rule.Build(fmt.Sprintf("metalava_%s", params.stubsType.String()), "metalava merged")
-	} else {
-		d.optionalStubCmd(ctx, optionalCmdParams)
-	}
-}
-
 func (d *Droidstubs) optionalStubCmd(ctx android.ModuleContext, params stubsCommandParams) {
 
 	params.srcJarDir = android.PathForModuleOut(ctx, params.stubConfig.stubsType.String(), "srcjars")
@@ -1176,8 +1133,6 @@
 
 	annotationsEnabled := Bool(d.properties.Annotations_enabled)
 
-	extractAnnotations := annotationsEnabled
-
 	migratingNullability := annotationsEnabled && String(d.properties.Previous_api) != ""
 	validatingNullability := annotationsEnabled && (strings.Contains(String(d.Javadoc.properties.Args), "--validate-nullability-from-merged-stubs") ||
 		String(d.properties.Validate_nullability_from_list) != "")
@@ -1185,40 +1140,27 @@
 	checkApi := apiCheckEnabled(ctx, d.properties.Check_api.Current, "current") ||
 		apiCheckEnabled(ctx, d.properties.Check_api.Last_released, "last_released")
 
-	apiLevelsAnnotationsEnabled := proptools.Bool(d.properties.Api_levels_annotations_enabled)
-
 	stubCmdParams := stubsCommandConfigParams{
-		javaVersion:                 javaVersion,
-		deps:                        deps,
-		checkApi:                    checkApi,
-		generateStubs:               generateStubs,
-		doApiLint:                   doApiLint,
-		doCheckReleased:             doCheckReleased,
-		writeSdkValues:              writeSdkValues,
-		migratingNullability:        migratingNullability,
-		validatingNullability:       validatingNullability,
-		annotationsEnabled:          annotationsEnabled,
-		apiLevelsAnnotationsEnabled: apiLevelsAnnotationsEnabled,
-		extractAnnotations:          extractAnnotations,
+		javaVersion:           javaVersion,
+		deps:                  deps,
+		checkApi:              checkApi,
+		generateStubs:         generateStubs,
+		doApiLint:             doApiLint,
+		doCheckReleased:       doCheckReleased,
+		writeSdkValues:        writeSdkValues,
+		migratingNullability:  migratingNullability,
+		validatingNullability: validatingNullability,
 	}
 	stubCmdParams.stubsType = Everything
 	// Create default (i.e. "everything" stubs) rule for metalava
 	d.everythingStubCmd(ctx, stubCmdParams)
 
-	// The module generates "exportable" stubs regardless of whether
+	// The module generates "exportable" (and "runtime" eventually) stubs regardless of whether
 	// aconfig_declarations property is defined or not. If the property is not defined, the module simply
 	// strips all flagged apis to generate the "exportable" stubs
 	stubCmdParams.stubsType = Exportable
 	d.exportableStubCmd(ctx, stubCmdParams)
 
-	// "runtime" stubs do not generate any other artifacts than the stubs.
-	// Therefore, metalava does not have to run for "runtime" configuration
-	// when the module does not generate stubs.
-	if stubCmdParams.generateStubs {
-		stubCmdParams.stubsType = Runtime
-		d.runtimeStubCmd(ctx, stubCmdParams)
-	}
-
 	if apiCheckEnabled(ctx, d.properties.Check_api.Current, "current") {
 
 		if len(d.Javadoc.properties.Out) > 0 {
diff --git a/java/droidstubs_test.go b/java/droidstubs_test.go
index c86e8bf..8da695f 100644
--- a/java/droidstubs_test.go
+++ b/java/droidstubs_test.go
@@ -397,47 +397,23 @@
 			"bar",
 		],
 	}
-	droidstubs {
-		name: "baz",
-		srcs: ["a/A.java"],
-		api_surface: "public",
-		check_api: {
-			current: {
-				api_file: "a/current.txt",
-				removed_api_file: "a/removed.txt",
-			}
-		},
-	}
 	`)
 
 	// Check that droidstubs depend on aconfig_declarations
 	android.AssertBoolEquals(t, "foo expected to depend on bar",
 		CheckModuleHasDependency(t, result.TestContext, "foo", "android_common", "bar"), true)
 
-	fooModule := result.ModuleForTests("foo", "android_common")
+	m := result.ModuleForTests("foo", "android_common")
 	android.AssertStringDoesContain(t, "foo generates revert annotations file",
-		strings.Join(fooModule.AllOutputs(), ""), "revert-annotations-exportable.txt")
+		strings.Join(m.AllOutputs(), ""), "revert-annotations-exportable.txt")
 
 	// revert-annotations.txt passed to exportable stubs generation metalava command
-	exportableManifest := fooModule.Output("metalava_exportable.sbox.textproto")
-	exportableCmdline := String(android.RuleBuilderSboxProtoForTests(t, result.TestContext, exportableManifest).Commands[0].Command)
-	android.AssertStringDoesContain(t, "flagged api hide command not included", exportableCmdline, "revert-annotations-exportable.txt")
+	manifest := m.Output("metalava_exportable.sbox.textproto")
+	cmdline := String(android.RuleBuilderSboxProtoForTests(t, result.TestContext, manifest).Commands[0].Command)
+	android.AssertStringDoesContain(t, "flagged api hide command not included", cmdline, "revert-annotations-exportable.txt")
 
 	android.AssertStringDoesContain(t, "foo generates exportable stubs jar",
-		strings.Join(fooModule.AllOutputs(), ""), "exportable/foo-stubs.srcjar")
-
-	// revert-annotations.txt passed to runtime stubs generation metalava command
-	runtimeManifest := fooModule.Output("metalava_runtime.sbox.textproto")
-	runtimeCmdline := String(android.RuleBuilderSboxProtoForTests(t, result.TestContext, runtimeManifest).Commands[0].Command)
-	android.AssertStringDoesContain(t, "flagged api hide command not included", runtimeCmdline, "revert-annotations-runtime.txt")
-
-	android.AssertStringDoesContain(t, "foo generates runtime stubs jar",
-		strings.Join(fooModule.AllOutputs(), ""), "runtime/foo-stubs.srcjar")
-
-	// If aconfig_declarations property is not defined, the runtime stubs is a copy of the exportable stubs
-	bazModule := result.ModuleForTests("baz", "android_common")
-	bazRuntimeCmdline := bazModule.Rule("metalava_runtime").RuleParams.Command
-	android.AssertStringDoesContain(t, "copy command should include the input stub", bazRuntimeCmdline, "exportable/baz-stubs.srcjar")
+		strings.Join(m.AllOutputs(), ""), "exportable/foo-stubs.srcjar")
 }
 
 func TestReleaseExportRuntimeApis(t *testing.T) {