Use soong built autogenerated RROs

At ToT, soong emits metadata to make (LOCAL_SOONG_PRODUCT_RRO_DIRS and
LOCAL_SOONG_DEVICE_RRO_DIRS), and make uses this metadata to build and
install apks that are intalled in /vendor or /product. This CL ports
this logic to soong.

This CL autogenerates these modules in a load hook for android_app and
override_android_app, and adds them to the `LOCAL_REQUIRED_MODULES` of
the base app. The autogenerated modules will inherit the enabled
property of the apps. This required me to add `Target.Android.Enabled`
to commonProperties in ModuleBase.

Since autogeneration happens in soong now,
`LOCAL_SOONG_(DEVICE|PRODUCT)_RRO_DIRS` no longer needs to be exported.

Followup work
- Installing the overlay variants for soong built filesystems.

Test: lunch aosp_cf_x86_64_phone-trunk_staging-userdebug
Test: no diff in system, vendor, product file_list.txt
Test: m out/target/product/vsoc_x86_64/vendor/overlay/SystemUI__aosp_cf_x86_64_phone__auto_generated_rro_vendor.apk

the apk is not bit-identical, but this is likely due to different
aapt link flags between make and soong (e.g. `--enable-compact-entries`
is added as default in soong but not in make
Test: aapt2 diff
SystemUI__aosp_cf_x86_64_phone__auto_generated_rro_vendor.apk.before
SystemUI__aosp_cf_x86_64_phone__auto_generated_rro_vendor.apk.after
reports no diffs

Change-Id: I9b212a4ed443250a63dbe27cb955c6f133cff9af
diff --git a/java/app.go b/java/app.go
index 34a548e..34884d7 100644
--- a/java/app.go
+++ b/java/app.go
@@ -223,6 +223,8 @@
 	javaApiUsedByOutputFile android.ModuleOutPath
 
 	privAppAllowlist android.OptionalPath
+
+	requiredModuleNames []string
 }
 
 func (a *AndroidApp) IsInstallable() bool {
@@ -421,6 +423,24 @@
 		TestHelperApp:   false,
 		EmbeddedJNILibs: embeddedJniLibs,
 	})
+
+	a.requiredModuleNames = a.getRequiredModuleNames(ctx)
+}
+
+func (a *AndroidApp) getRequiredModuleNames(ctx android.ModuleContext) []string {
+	var required []string
+	if proptools.Bool(a.appProperties.Generate_product_characteristics_rro) {
+		required = []string{a.productCharacteristicsRROPackageName()}
+	}
+	// Install the vendor overlay variant if this app is installed.
+	if len(filterRRO(a.rroDirsDepSet, device)) > 0 {
+		required = append(required, AutogeneratedRroModuleName(ctx, ctx.Module().Name(), "vendor"))
+	}
+	// Install the product overlay variant if this app is installed.
+	if len(filterRRO(a.rroDirsDepSet, product)) > 0 {
+		required = append(required, AutogeneratedRroModuleName(ctx, ctx.Module().Name(), "product"))
+	}
+	return required
 }
 
 func (a *AndroidApp) checkAppSdkVersions(ctx android.ModuleContext) {
@@ -1377,6 +1397,11 @@
 			}
 		}
 		ctx.CreateModule(RuntimeResourceOverlayFactory, &rroProperties)
+
+	})
+
+	module.SetDefaultableHook(func(ctx android.DefaultableHookContext) {
+		createInternalRuntimeOverlays(ctx, module.ModuleBase)
 	})
 
 	return module
@@ -1386,6 +1411,68 @@
 	return fmt.Sprintf("%s__%s__auto_generated_rro_%s", moduleName, ctx.Config().DeviceProduct(), partition)
 }
 
+type createModuleContext interface {
+	android.EarlyModuleContext
+	CreateModule(android.ModuleFactory, ...interface{}) android.Module
+}
+
+func createInternalRuntimeOverlays(ctx createModuleContext, a android.ModuleBase) {
+	if !ctx.Config().HasDeviceProduct() {
+		return
+	}
+	// vendor
+	vendorOverlayProps := struct {
+		Name                *string
+		Base                *string
+		Vendor              *bool
+		Product_specific    *bool
+		System_ext_specific *bool
+		Manifest            *string
+		Sdk_version         *string
+		Compile_multilib    *string
+		Enabled             proptools.Configurable[bool]
+	}{
+		Name:                proptools.StringPtr(AutogeneratedRroModuleName(ctx, a.Name(), "vendor")),
+		Base:                proptools.StringPtr(a.Name()),
+		Vendor:              proptools.BoolPtr(true),
+		Product_specific:    proptools.BoolPtr(false),
+		System_ext_specific: proptools.BoolPtr(false),
+		Manifest:            proptools.StringPtr(":" + a.Name() + "{.manifest.xml}"),
+		Sdk_version:         proptools.StringPtr("current"),
+		Compile_multilib:    proptools.StringPtr("first"),
+		Enabled:             a.EnabledProperty().Clone(),
+	}
+	ctx.CreateModule(AutogenRuntimeResourceOverlayFactory, &vendorOverlayProps)
+
+	// product
+	productOverlayProps := struct {
+		Name                *string
+		Base                *string
+		Vendor              *bool
+		Proprietary         *bool
+		Soc_specific        *bool
+		Product_specific    *bool
+		System_ext_specific *bool
+		Manifest            *string
+		Sdk_version         *string
+		Compile_multilib    *string
+		Enabled             proptools.Configurable[bool]
+	}{
+		Name:                proptools.StringPtr(AutogeneratedRroModuleName(ctx, a.Name(), "product")),
+		Base:                proptools.StringPtr(a.Name()),
+		Vendor:              proptools.BoolPtr(false),
+		Proprietary:         proptools.BoolPtr(false),
+		Soc_specific:        proptools.BoolPtr(false),
+		Product_specific:    proptools.BoolPtr(true),
+		System_ext_specific: proptools.BoolPtr(false),
+		Manifest:            proptools.StringPtr(":" + a.Name() + "{.manifest.xml}"),
+		Sdk_version:         proptools.StringPtr("current"),
+		Compile_multilib:    proptools.StringPtr("first"),
+		Enabled:             a.EnabledProperty().Clone(),
+	}
+	ctx.CreateModule(AutogenRuntimeResourceOverlayFactory, &productOverlayProps)
+}
+
 // A dictionary of values to be overridden in the manifest.
 type Manifest_values struct {
 	// Overrides the value of package_name in the manifest
@@ -1696,6 +1783,10 @@
 
 	android.InitAndroidMultiTargetsArchModule(m, android.DeviceSupported, android.MultilibCommon)
 	android.InitOverrideModule(m)
+	android.AddLoadHook(m, func(ctx android.LoadHookContext) {
+		createInternalRuntimeOverlays(ctx, m.ModuleBase)
+	})
+
 	return m
 }