add aidl.export_include_dirs to java_import module type

This allows a java prebuilt to export AIDL files to its clients.

Bug: 151933053
Test: m
Change-Id: I21b5d5ce647141a7c76f62490adbccb858b10323

java/java.go

@@ -2338,6 +2338,12 @@ type ImportProperties struct {
 
 	// set the name of the output
 	Stem *string
+
+	Aidl struct {
+		// directories that should be added as include directories for any aidl sources of modules
+		// that depend on this module, as well as to aidl for this module.
+		Export_include_dirs []string
+	}
 }
 
 type Import struct {
@@ -2351,6 +2357,7 @@ type Import struct {
 
 	combinedClasspathFile android.Path
 	exportedSdkLibs       []string
+	exportAidlIncludeDirs android.Paths
 }
 
 func (j *Import) sdkVersion() sdkSpec {
@@ -2424,6 +2431,8 @@ func (j *Import) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		ctx.InstallFile(android.PathForModuleInstall(ctx, "framework"),
 			jarName, outputFile)
 	}
+
+	j.exportAidlIncludeDirs = android.PathsForModuleSrc(ctx, j.properties.Aidl.Export_include_dirs)
 }
 
 var _ Dependency = (*Import)(nil)
@@ -2458,7 +2467,7 @@ func (j *Import) DexJar() android.Path {
 }
 
 func (j *Import) AidlIncludeDirs() android.Paths {
-	return nil
+	return j.exportAidlIncludeDirs
 }
 
 func (j *Import) ExportedSdkLibs() []string {

java/java_test.go

@@ -1491,3 +1491,27 @@ func checkBootClasspathForSystemModule(t *testing.T, ctx *android.TestContext, m
 		t.Errorf("bootclasspath of %q must start with --system and end with %q, but was %#v.", moduleName, expectedSuffix, bootClasspath)
 	}
 }
+
+func TestAidlExportIncludeDirsFromImports(t *testing.T) {
+	ctx, _ := testJava(t, `
+		java_library {
+			name: "foo",
+			srcs: ["aidl/foo/IFoo.aidl"],
+			libs: ["bar"],
+		}
+
+		java_import {
+			name: "bar",
+			jars: ["a.jar"],
+			aidl: {
+				export_include_dirs: ["aidl/bar"],
+			},
+		}
+	`)
+
+	aidlCommand := ctx.ModuleForTests("foo", "android_common").Rule("aidl").RuleParams.Command
+	expectedAidlFlag := "-Iaidl/bar"
+	if !strings.Contains(aidlCommand, expectedAidlFlag) {
+		t.Errorf("aidl command %q does not contain %q", aidlCommand, expectedAidlFlag)
+	}
+}

java/testing.go

@@ -50,6 +50,8 @@ func TestConfig(buildDir string, env map[string]string, bp string, fs map[string
 		"api/test-current.txt":   nil,
 		"api/test-removed.txt":   nil,
 		"framework/aidl/a.aidl":  nil,
+		"aidl/foo/IFoo.aidl":     nil,
+		"aidl/bar/IBar.aidl":     nil,
 		"assets_a/a":             nil,
 		"assets_b/b":             nil,