Adding relative_install_path field to android_app_import

Test: Ran go test ./java from build/soong
Bug: 149873762
Change-Id: I4abc1fb9e2386c7319b446b84aebaabacc882fd6

java/app_import.go

@@ -99,6 +99,9 @@ type AndroidAppImportProperties struct {
 	// If set, create package-export.apk, which other packages can
 	// use to get PRODUCT-agnostic resource data like IDs and type definitions.
 	Export_package_resources *bool
+
+	// Optional. Install to a subdirectory of the default install path for the module
+	Relative_install_path *string
 }
 
 func (a *AndroidAppImport) IsInstallable() bool {
@@ -263,20 +266,25 @@ func (a *AndroidAppImport) generateAndroidBuildActions(ctx android.ModuleContext
 	jnisUncompressed := android.PathForModuleOut(ctx, "jnis-uncompressed", ctx.ModuleName()+".apk")
 	a.uncompressEmbeddedJniLibs(ctx, srcApk, jnisUncompressed.OutputPath)
 
-	var installDir android.InstallPath
+	var pathFragments []string
+	relInstallPath := String(a.properties.Relative_install_path)
 
 	if a.isPrebuiltFrameworkRes() {
 		// framework-res.apk is installed as system/framework/framework-res.apk
-		installDir = android.PathForModuleInstall(ctx, "framework")
+		if relInstallPath != "" {
+			ctx.PropertyErrorf("relative_install_path", "Relative_install_path cannot be set for framework-res")
+		}
+		pathFragments = []string{"framework"}
 		a.preprocessed = true
 	} else if Bool(a.properties.Privileged) {
-		installDir = android.PathForModuleInstall(ctx, "priv-app", a.BaseModuleName())
+		pathFragments = []string{"priv-app", relInstallPath, a.BaseModuleName()}
 	} else if ctx.InstallInTestcases() {
-		installDir = android.PathForModuleInstall(ctx, a.BaseModuleName(), ctx.DeviceConfig().DeviceArch())
+		pathFragments = []string{relInstallPath, a.BaseModuleName(), ctx.DeviceConfig().DeviceArch()}
 	} else {
-		installDir = android.PathForModuleInstall(ctx, "app", a.BaseModuleName())
+		pathFragments = []string{"app", relInstallPath, a.BaseModuleName()}
 	}
 
+	installDir := android.PathForModuleInstall(ctx, pathFragments...)
 	a.dexpreopter.isApp = true
 	a.dexpreopter.installPath = installDir.Join(ctx, a.BaseModuleName()+".apk")
 	a.dexpreopter.isPresignedPrebuilt = Bool(a.properties.Presigned)

java/app_import_test.go

@@ -493,6 +493,69 @@ func TestAndroidAppImport_frameworkRes(t *testing.T) {
 	}
 }
 
+func TestAndroidAppImport_relativeInstallPath(t *testing.T) {
+	bp := `
+		android_app_import {
+			name: "no_relative_install_path",
+			apk: "prebuilts/apk/app.apk",
+			presigned: true,
+		}
+
+		android_app_import {
+			name: "relative_install_path",
+			apk: "prebuilts/apk/app.apk",
+			presigned: true,
+			relative_install_path: "my/path",
+		}
+
+		android_app_import {
+			name: "framework-res",
+			apk: "prebuilts/apk/app.apk",
+			presigned: true,
+			prefer: true,
+		}
+
+		android_app_import {
+			name: "privileged_relative_install_path",
+			apk: "prebuilts/apk/app.apk",
+			presigned: true,
+			privileged: true,
+			relative_install_path: "my/path"
+		}
+		`
+	testCases := []struct {
+		name                string
+		expectedInstallPath string
+		errorMessage        string
+	}{
+		{
+			name:                "no_relative_install_path",
+			expectedInstallPath: "out/soong/target/product/test_device/system/app/no_relative_install_path/no_relative_install_path.apk",
+			errorMessage:        "Install path is not correct when relative_install_path is missing",
+		},
+		{
+			name:                "relative_install_path",
+			expectedInstallPath: "out/soong/target/product/test_device/system/app/my/path/relative_install_path/relative_install_path.apk",
+			errorMessage:        "Install path is not correct for app when relative_install_path is present",
+		},
+		{
+			name:                "prebuilt_framework-res",
+			expectedInstallPath: "out/soong/target/product/test_device/system/framework/framework-res.apk",
+			errorMessage:        "Install path is not correct for framework-res",
+		},
+		{
+			name:                "privileged_relative_install_path",
+			expectedInstallPath: "out/soong/target/product/test_device/system/priv-app/my/path/privileged_relative_install_path/privileged_relative_install_path.apk",
+			errorMessage:        "Install path is not correct for privileged app when relative_install_path is present",
+		},
+	}
+	for _, testCase := range testCases {
+		ctx, _ := testJava(t, bp)
+		mod := ctx.ModuleForTests(testCase.name, "android_common").Module().(*AndroidAppImport)
+		android.AssertPathRelativeToTopEquals(t, testCase.errorMessage, testCase.expectedInstallPath, mod.installPath)
+	}
+}
+
 func TestAndroidTestImport(t *testing.T) {
 	ctx, _ := testJava(t, `
 		android_test_import {