diff --git a/android/Android.bp b/android/Android.bp
index f58a472..e0ad58f 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -38,7 +38,9 @@
         "bazel_paths.go",
         "buildinfo_prop.go",
         "config.go",
+        "test_config.go",
         "config_bp2build.go",
+        "configured_jars.go",
         "csuite_config.go",
         "deapexer.go",
         "defaults.go",
diff --git a/android/allowlists/allowlists.go b/android/allowlists/allowlists.go
index a5799a5..0721953 100644
--- a/android/allowlists/allowlists.go
+++ b/android/allowlists/allowlists.go
@@ -574,5 +574,12 @@
 		"prebuilt_android-support-annotations-nodeps",
 		"prebuilt_android-arch-paging-common-nodeps",
 		"prebuilt_android-arch-room-common-nodeps",
+
+		// Disabled pending the investigation of b/242220039
+		"libhidlbase",
+		"android.hidl.base@1.0",
+		"android.hidl.manager@1.0",
+		"android.hidl.manager@1.1",
+		"android.hidl.manager@1.2",
 	}
 )
diff --git a/android/arch.go b/android/arch.go
index 6acc8ad..b5bd2f0 100644
--- a/android/arch.go
+++ b/android/arch.go
@@ -393,54 +393,6 @@
 	}
 }
 
-func registerBp2buildArchPathDepsMutator(ctx RegisterMutatorsContext) {
-	ctx.BottomUp("bp2build-arch-pathdeps", bp2buildArchPathDepsMutator).Parallel()
-}
-
-// add dependencies for architecture specific properties tagged with `android:"path"`
-func bp2buildArchPathDepsMutator(ctx BottomUpMutatorContext) {
-	var module Module
-	module = ctx.Module()
-
-	m := module.base()
-	if !m.ArchSpecific() {
-		return
-	}
-
-	// addPathDepsForProps does not descend into sub structs, so we need to descend into the
-	// arch-specific properties ourselves
-	var properties []interface{}
-	for _, archProperties := range m.archProperties {
-		for _, archProps := range archProperties {
-			archPropValues := reflect.ValueOf(archProps).Elem()
-			// there are three "arch" variations, descend into each
-			for _, variant := range []string{"Arch", "Multilib", "Target"} {
-				// The properties are an interface, get the value (a pointer) that it points to
-				archProps := archPropValues.FieldByName(variant).Elem()
-				if archProps.IsNil() {
-					continue
-				}
-				// And then a pointer to a struct
-				archProps = archProps.Elem()
-				for i := 0; i < archProps.NumField(); i += 1 {
-					f := archProps.Field(i)
-					// If the value of the field is a struct (as opposed to a pointer to a struct) then step
-					// into the BlueprintEmbed field.
-					if f.Kind() == reflect.Struct {
-						f = f.FieldByName("BlueprintEmbed")
-					}
-					if f.IsZero() {
-						continue
-					}
-					props := f.Interface().(interface{})
-					properties = append(properties, props)
-				}
-			}
-		}
-	}
-	addPathDepsForProps(ctx, properties)
-}
-
 // osMutator splits an arch-specific module into a variant for each OS that is enabled for the
 // module.  It uses the HostOrDevice value passed to InitAndroidArchModule and the
 // device_supported and host_supported properties to determine which OsTypes are enabled for this
@@ -998,19 +950,13 @@
 		if string(field.Tag) != `android:"`+strings.Join(values, ",")+`"` {
 			panic(fmt.Errorf("unexpected tag format %q", field.Tag))
 		}
-		// don't delete path tag as it is needed for bp2build
 		// these tags don't need to be present in the runtime generated struct type.
-		values = RemoveListFromList(values, []string{"arch_variant", "variant_prepend"})
-		if len(values) > 0 && values[0] != "path" {
+		values = RemoveListFromList(values, []string{"arch_variant", "variant_prepend", "path"})
+		if len(values) > 0 {
 			panic(fmt.Errorf("unknown tags %q in field %q", values, prefix+field.Name))
-		} else if len(values) == 1 {
-			// FIXME(b/200678898): This assumes that the only tag type when there's
-			// `android:"arch_variant"` is `android` itself and thus clobbers others
-			field.Tag = reflect.StructTag(`android:"` + strings.Join(values, ",") + `"`)
-		} else {
-			field.Tag = ``
 		}
 
+		field.Tag = ``
 		return true, field
 	}
 	return false, field
diff --git a/android/arch_test.go b/android/arch_test.go
index dd0b115..ad2076d 100644
--- a/android/arch_test.go
+++ b/android/arch_test.go
@@ -66,9 +66,9 @@
 			}{},
 			out: &struct {
 				A *string
-				B *string `android:"path"`
-				C *string `android:"path"`
-				D *string `android:"path"`
+				B *string
+				C *string
+				D *string
 			}{},
 			filtered: true,
 		},
diff --git a/android/bazel_handler.go b/android/bazel_handler.go
index 000f759..a5fa043 100644
--- a/android/bazel_handler.go
+++ b/android/bazel_handler.go
@@ -29,6 +29,7 @@
 
 	"android/soong/bazel/cquery"
 	"android/soong/shared"
+
 	"github.com/google/blueprint"
 
 	"android/soong/bazel"
@@ -54,7 +55,7 @@
 }
 
 func RegisterMixedBuildsMutator(ctx RegistrationContext) {
-	ctx.PostDepsMutators(func(ctx RegisterMutatorsContext) {
+	ctx.FinalDepsMutators(func(ctx RegisterMutatorsContext) {
 		ctx.BottomUp("mixed_builds_prep", mixedBuildsPrepareMutator).Parallel()
 	})
 }
diff --git a/android/config.go b/android/config.go
index 84c17de..3e7dc47 100644
--- a/android/config.go
+++ b/android/config.go
@@ -20,7 +20,6 @@
 import (
 	"bytes"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -345,123 +344,6 @@
 	}
 }
 
-// TestConfig returns a Config object for testing.
-func TestConfig(buildDir string, env map[string]string, bp string, fs map[string][]byte) Config {
-	envCopy := make(map[string]string)
-	for k, v := range env {
-		envCopy[k] = v
-	}
-
-	// Copy the real PATH value to the test environment, it's needed by
-	// NonHermeticHostSystemTool() used in x86_darwin_host.go
-	envCopy["PATH"] = os.Getenv("PATH")
-
-	config := &config{
-		productVariables: productVariables{
-			DeviceName:                          stringPtr("test_device"),
-			DeviceProduct:                       stringPtr("test_product"),
-			Platform_sdk_version:                intPtr(30),
-			Platform_sdk_codename:               stringPtr("S"),
-			Platform_base_sdk_extension_version: intPtr(1),
-			Platform_version_active_codenames:   []string{"S", "Tiramisu"},
-			DeviceSystemSdkVersions:             []string{"14", "15"},
-			Platform_systemsdk_versions:         []string{"29", "30"},
-			AAPTConfig:                          []string{"normal", "large", "xlarge", "hdpi", "xhdpi", "xxhdpi"},
-			AAPTPreferredConfig:                 stringPtr("xhdpi"),
-			AAPTCharacteristics:                 stringPtr("nosdcard"),
-			AAPTPrebuiltDPI:                     []string{"xhdpi", "xxhdpi"},
-			UncompressPrivAppDex:                boolPtr(true),
-			ShippingApiLevel:                    stringPtr("30"),
-		},
-
-		outDir:       buildDir,
-		soongOutDir:  filepath.Join(buildDir, "soong"),
-		captureBuild: true,
-		env:          envCopy,
-
-		// Set testAllowNonExistentPaths so that test contexts don't need to specify every path
-		// passed to PathForSource or PathForModuleSrc.
-		TestAllowNonExistentPaths: true,
-
-		BazelContext:              noopBazelContext{},
-		mixedBuildDisabledModules: make(map[string]struct{}),
-		mixedBuildEnabledModules:  make(map[string]struct{}),
-	}
-	config.deviceConfig = &deviceConfig{
-		config: config,
-	}
-	config.TestProductVariables = &config.productVariables
-
-	config.mockFileSystem(bp, fs)
-
-	determineBuildOS(config)
-
-	return Config{config}
-}
-
-func modifyTestConfigToSupportArchMutator(testConfig Config) {
-	config := testConfig.config
-
-	config.Targets = map[OsType][]Target{
-		Android: []Target{
-			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", "", false},
-			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", "", false},
-		},
-		config.BuildOS: []Target{
-			{config.BuildOS, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", "", false},
-			{config.BuildOS, Arch{ArchType: X86}, NativeBridgeDisabled, "", "", false},
-		},
-	}
-
-	if runtime.GOOS == "darwin" {
-		config.Targets[config.BuildOS] = config.Targets[config.BuildOS][:1]
-	}
-
-	config.BuildOSTarget = config.Targets[config.BuildOS][0]
-	config.BuildOSCommonTarget = getCommonTargets(config.Targets[config.BuildOS])[0]
-	config.AndroidCommonTarget = getCommonTargets(config.Targets[Android])[0]
-	config.AndroidFirstDeviceTarget = FirstTarget(config.Targets[Android], "lib64", "lib32")[0]
-	config.TestProductVariables.DeviceArch = proptools.StringPtr("arm64")
-	config.TestProductVariables.DeviceArchVariant = proptools.StringPtr("armv8-a")
-	config.TestProductVariables.DeviceSecondaryArch = proptools.StringPtr("arm")
-	config.TestProductVariables.DeviceSecondaryArchVariant = proptools.StringPtr("armv7-a-neon")
-}
-
-func modifyTestConfigForMusl(config Config) {
-	delete(config.Targets, config.BuildOS)
-	config.productVariables.HostMusl = boolPtr(true)
-	determineBuildOS(config.config)
-	config.Targets[config.BuildOS] = []Target{
-		{config.BuildOS, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", "", false},
-		{config.BuildOS, Arch{ArchType: X86}, NativeBridgeDisabled, "", "", false},
-	}
-
-	config.BuildOSTarget = config.Targets[config.BuildOS][0]
-	config.BuildOSCommonTarget = getCommonTargets(config.Targets[config.BuildOS])[0]
-}
-
-// TestArchConfig returns a Config object suitable for using for tests that
-// need to run the arch mutator.
-func TestArchConfig(buildDir string, env map[string]string, bp string, fs map[string][]byte) Config {
-	testConfig := TestConfig(buildDir, env, bp, fs)
-	modifyTestConfigToSupportArchMutator(testConfig)
-	return testConfig
-}
-
-// ConfigForAdditionalRun is a config object which is "reset" for another
-// bootstrap run. Only per-run data is reset. Data which needs to persist across
-// multiple runs in the same program execution is carried over (such as Bazel
-// context or environment deps).
-func ConfigForAdditionalRun(c Config) (Config, error) {
-	newConfig, err := NewConfig(c.moduleListFile, c.runGoTests, c.outDir, c.soongOutDir, c.env)
-	if err != nil {
-		return Config{}, err
-	}
-	newConfig.BazelContext = c.BazelContext
-	newConfig.envDeps = c.envDeps
-	return newConfig, nil
-}
-
 // NewConfig creates a new Config object. The srcDir argument specifies the path
 // to the root source directory. It also loads the config file, if found.
 func NewConfig(moduleListFile string, runGoTests bool, outDir, soongOutDir string, availableEnv map[string]string) (Config, error) {
@@ -744,7 +626,8 @@
 // these per device type.
 //
 // NOTE: Do not base conditional logic on this value. It may break product
-//       inheritance.
+//
+//	inheritance.
 func (c *config) DeviceProduct() string {
 	return *c.productVariables.DeviceProduct
 }
@@ -1737,316 +1620,6 @@
 	return c.productVariables.IgnorePrefer32OnDevice
 }
 
-// The ConfiguredJarList struct provides methods for handling a list of (apex, jar) pairs.
-// Such lists are used in the build system for things like bootclasspath jars or system server jars.
-// The apex part is either an apex name, or a special names "platform" or "system_ext". Jar is a
-// module name. The pairs come from Make product variables as a list of colon-separated strings.
-//
-// Examples:
-//   - "com.android.art:core-oj"
-//   - "platform:framework"
-//   - "system_ext:foo"
-//
-type ConfiguredJarList struct {
-	// A list of apex components, which can be an apex name,
-	// or special names like "platform" or "system_ext".
-	apexes []string
-
-	// A list of jar module name components.
-	jars []string
-}
-
-// Len returns the length of the list of jars.
-func (l *ConfiguredJarList) Len() int {
-	return len(l.jars)
-}
-
-// Jar returns the idx-th jar component of (apex, jar) pairs.
-func (l *ConfiguredJarList) Jar(idx int) string {
-	return l.jars[idx]
-}
-
-// Apex returns the idx-th apex component of (apex, jar) pairs.
-func (l *ConfiguredJarList) Apex(idx int) string {
-	return l.apexes[idx]
-}
-
-// ContainsJar returns true if the (apex, jar) pairs contains a pair with the
-// given jar module name.
-func (l *ConfiguredJarList) ContainsJar(jar string) bool {
-	return InList(jar, l.jars)
-}
-
-// If the list contains the given (apex, jar) pair.
-func (l *ConfiguredJarList) containsApexJarPair(apex, jar string) bool {
-	for i := 0; i < l.Len(); i++ {
-		if apex == l.apexes[i] && jar == l.jars[i] {
-			return true
-		}
-	}
-	return false
-}
-
-// ApexOfJar returns the apex component of the first pair with the given jar name on the list, or
-// an empty string if not found.
-func (l *ConfiguredJarList) ApexOfJar(jar string) string {
-	if idx := IndexList(jar, l.jars); idx != -1 {
-		return l.Apex(IndexList(jar, l.jars))
-	}
-	return ""
-}
-
-// IndexOfJar returns the first pair with the given jar name on the list, or -1
-// if not found.
-func (l *ConfiguredJarList) IndexOfJar(jar string) int {
-	return IndexList(jar, l.jars)
-}
-
-func copyAndAppend(list []string, item string) []string {
-	// Create the result list to be 1 longer than the input.
-	result := make([]string, len(list)+1)
-
-	// Copy the whole input list into the result.
-	count := copy(result, list)
-
-	// Insert the extra item at the end.
-	result[count] = item
-
-	return result
-}
-
-// Append an (apex, jar) pair to the list.
-func (l *ConfiguredJarList) Append(apex string, jar string) ConfiguredJarList {
-	// Create a copy of the backing arrays before appending to avoid sharing backing
-	// arrays that are mutated across instances.
-	apexes := copyAndAppend(l.apexes, apex)
-	jars := copyAndAppend(l.jars, jar)
-
-	return ConfiguredJarList{apexes, jars}
-}
-
-// Append a list of (apex, jar) pairs to the list.
-func (l *ConfiguredJarList) AppendList(other *ConfiguredJarList) ConfiguredJarList {
-	apexes := make([]string, 0, l.Len()+other.Len())
-	jars := make([]string, 0, l.Len()+other.Len())
-
-	apexes = append(apexes, l.apexes...)
-	jars = append(jars, l.jars...)
-
-	apexes = append(apexes, other.apexes...)
-	jars = append(jars, other.jars...)
-
-	return ConfiguredJarList{apexes, jars}
-}
-
-// RemoveList filters out a list of (apex, jar) pairs from the receiving list of pairs.
-func (l *ConfiguredJarList) RemoveList(list ConfiguredJarList) ConfiguredJarList {
-	apexes := make([]string, 0, l.Len())
-	jars := make([]string, 0, l.Len())
-
-	for i, jar := range l.jars {
-		apex := l.apexes[i]
-		if !list.containsApexJarPair(apex, jar) {
-			apexes = append(apexes, apex)
-			jars = append(jars, jar)
-		}
-	}
-
-	return ConfiguredJarList{apexes, jars}
-}
-
-// Filter keeps the entries if a jar appears in the given list of jars to keep. Returns a new list
-// and any remaining jars that are not on this list.
-func (l *ConfiguredJarList) Filter(jarsToKeep []string) (ConfiguredJarList, []string) {
-	var apexes []string
-	var jars []string
-
-	for i, jar := range l.jars {
-		if InList(jar, jarsToKeep) {
-			apexes = append(apexes, l.apexes[i])
-			jars = append(jars, jar)
-		}
-	}
-
-	return ConfiguredJarList{apexes, jars}, RemoveListFromList(jarsToKeep, jars)
-}
-
-// CopyOfJars returns a copy of the list of strings containing jar module name
-// components.
-func (l *ConfiguredJarList) CopyOfJars() []string {
-	return CopyOf(l.jars)
-}
-
-// CopyOfApexJarPairs returns a copy of the list of strings with colon-separated
-// (apex, jar) pairs.
-func (l *ConfiguredJarList) CopyOfApexJarPairs() []string {
-	pairs := make([]string, 0, l.Len())
-
-	for i, jar := range l.jars {
-		apex := l.apexes[i]
-		pairs = append(pairs, apex+":"+jar)
-	}
-
-	return pairs
-}
-
-// BuildPaths returns a list of build paths based on the given directory prefix.
-func (l *ConfiguredJarList) BuildPaths(ctx PathContext, dir OutputPath) WritablePaths {
-	paths := make(WritablePaths, l.Len())
-	for i, jar := range l.jars {
-		paths[i] = dir.Join(ctx, ModuleStem(jar)+".jar")
-	}
-	return paths
-}
-
-// BuildPathsByModule returns a map from module name to build paths based on the given directory
-// prefix.
-func (l *ConfiguredJarList) BuildPathsByModule(ctx PathContext, dir OutputPath) map[string]WritablePath {
-	paths := map[string]WritablePath{}
-	for _, jar := range l.jars {
-		paths[jar] = dir.Join(ctx, ModuleStem(jar)+".jar")
-	}
-	return paths
-}
-
-// UnmarshalJSON converts JSON configuration from raw bytes into a
-// ConfiguredJarList structure.
-func (l *ConfiguredJarList) UnmarshalJSON(b []byte) error {
-	// Try and unmarshal into a []string each item of which contains a pair
-	// <apex>:<jar>.
-	var list []string
-	err := json.Unmarshal(b, &list)
-	if err != nil {
-		// Did not work so return
-		return err
-	}
-
-	apexes, jars, err := splitListOfPairsIntoPairOfLists(list)
-	if err != nil {
-		return err
-	}
-	l.apexes = apexes
-	l.jars = jars
-	return nil
-}
-
-func (l *ConfiguredJarList) MarshalJSON() ([]byte, error) {
-	if len(l.apexes) != len(l.jars) {
-		return nil, errors.New(fmt.Sprintf("Inconsistent ConfiguredJarList: apexes: %q, jars: %q", l.apexes, l.jars))
-	}
-
-	list := make([]string, 0, len(l.apexes))
-
-	for i := 0; i < len(l.apexes); i++ {
-		list = append(list, l.apexes[i]+":"+l.jars[i])
-	}
-
-	return json.Marshal(list)
-}
-
-// ModuleStem hardcodes the stem of framework-minus-apex to return "framework".
-//
-// TODO(b/139391334): hard coded until we find a good way to query the stem of a
-// module before any other mutators are run.
-func ModuleStem(module string) string {
-	if module == "framework-minus-apex" {
-		return "framework"
-	}
-	return module
-}
-
-// DevicePaths computes the on-device paths for the list of (apex, jar) pairs,
-// based on the operating system.
-func (l *ConfiguredJarList) DevicePaths(cfg Config, ostype OsType) []string {
-	paths := make([]string, l.Len())
-	for i, jar := range l.jars {
-		apex := l.apexes[i]
-		name := ModuleStem(jar) + ".jar"
-
-		var subdir string
-		if apex == "platform" {
-			subdir = "system/framework"
-		} else if apex == "system_ext" {
-			subdir = "system_ext/framework"
-		} else {
-			subdir = filepath.Join("apex", apex, "javalib")
-		}
-
-		if ostype.Class == Host {
-			paths[i] = filepath.Join(cfg.Getenv("OUT_DIR"), "host", cfg.PrebuiltOS(), subdir, name)
-		} else {
-			paths[i] = filepath.Join("/", subdir, name)
-		}
-	}
-	return paths
-}
-
-func (l *ConfiguredJarList) String() string {
-	var pairs []string
-	for i := 0; i < l.Len(); i++ {
-		pairs = append(pairs, l.apexes[i]+":"+l.jars[i])
-	}
-	return strings.Join(pairs, ",")
-}
-
-func splitListOfPairsIntoPairOfLists(list []string) ([]string, []string, error) {
-	// Now we need to populate this list by splitting each item in the slice of
-	// pairs and appending them to the appropriate list of apexes or jars.
-	apexes := make([]string, len(list))
-	jars := make([]string, len(list))
-
-	for i, apexjar := range list {
-		apex, jar, err := splitConfiguredJarPair(apexjar)
-		if err != nil {
-			return nil, nil, err
-		}
-		apexes[i] = apex
-		jars[i] = jar
-	}
-
-	return apexes, jars, nil
-}
-
-// Expected format for apexJarValue = <apex name>:<jar name>
-func splitConfiguredJarPair(str string) (string, string, error) {
-	pair := strings.SplitN(str, ":", 2)
-	if len(pair) == 2 {
-		apex := pair[0]
-		jar := pair[1]
-		if apex == "" {
-			return apex, jar, fmt.Errorf("invalid apex '%s' in <apex>:<jar> pair '%s', expected format: <apex>:<jar>", apex, str)
-		}
-		return apex, jar, nil
-	} else {
-		return "error-apex", "error-jar", fmt.Errorf("malformed (apex, jar) pair: '%s', expected format: <apex>:<jar>", str)
-	}
-}
-
-// CreateTestConfiguredJarList is a function to create ConfiguredJarList for tests.
-func CreateTestConfiguredJarList(list []string) ConfiguredJarList {
-	// Create the ConfiguredJarList in as similar way as it is created at runtime by marshalling to
-	// a json list of strings and then unmarshalling into a ConfiguredJarList instance.
-	b, err := json.Marshal(list)
-	if err != nil {
-		panic(err)
-	}
-
-	var jarList ConfiguredJarList
-	err = json.Unmarshal(b, &jarList)
-	if err != nil {
-		panic(err)
-	}
-
-	return jarList
-}
-
-// EmptyConfiguredJarList returns an empty jar list.
-func EmptyConfiguredJarList() ConfiguredJarList {
-	return ConfiguredJarList{}
-}
-
-var earlyBootJarsKey = NewOnceKey("earlyBootJars")
-
 func (c *config) BootJars() []string {
 	return c.Once(earlyBootJarsKey, func() interface{} {
 		list := c.productVariables.BootJars.CopyOfJars()
diff --git a/android/configured_jars.go b/android/configured_jars.go
new file mode 100644
index 0000000..53fef05
--- /dev/null
+++ b/android/configured_jars.go
@@ -0,0 +1,314 @@
+// Copyright 2022 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"path/filepath"
+	"strings"
+)
+
+// The ConfiguredJarList struct provides methods for handling a list of (apex, jar) pairs.
+// Such lists are used in the build system for things like bootclasspath jars or system server jars.
+// The apex part is either an apex name, or a special names "platform" or "system_ext". Jar is a
+// module name. The pairs come from Make product variables as a list of colon-separated strings.
+//
+// Examples:
+//   - "com.android.art:core-oj"
+//   - "platform:framework"
+//   - "system_ext:foo"
+type ConfiguredJarList struct {
+	// A list of apex components, which can be an apex name,
+	// or special names like "platform" or "system_ext".
+	apexes []string
+
+	// A list of jar module name components.
+	jars []string
+}
+
+// Len returns the length of the list of jars.
+func (l *ConfiguredJarList) Len() int {
+	return len(l.jars)
+}
+
+// Jar returns the idx-th jar component of (apex, jar) pairs.
+func (l *ConfiguredJarList) Jar(idx int) string {
+	return l.jars[idx]
+}
+
+// Apex returns the idx-th apex component of (apex, jar) pairs.
+func (l *ConfiguredJarList) Apex(idx int) string {
+	return l.apexes[idx]
+}
+
+// ContainsJar returns true if the (apex, jar) pairs contains a pair with the
+// given jar module name.
+func (l *ConfiguredJarList) ContainsJar(jar string) bool {
+	return InList(jar, l.jars)
+}
+
+// If the list contains the given (apex, jar) pair.
+func (l *ConfiguredJarList) containsApexJarPair(apex, jar string) bool {
+	for i := 0; i < l.Len(); i++ {
+		if apex == l.apexes[i] && jar == l.jars[i] {
+			return true
+		}
+	}
+	return false
+}
+
+// ApexOfJar returns the apex component of the first pair with the given jar name on the list, or
+// an empty string if not found.
+func (l *ConfiguredJarList) ApexOfJar(jar string) string {
+	if idx := IndexList(jar, l.jars); idx != -1 {
+		return l.Apex(IndexList(jar, l.jars))
+	}
+	return ""
+}
+
+// IndexOfJar returns the first pair with the given jar name on the list, or -1
+// if not found.
+func (l *ConfiguredJarList) IndexOfJar(jar string) int {
+	return IndexList(jar, l.jars)
+}
+
+func copyAndAppend(list []string, item string) []string {
+	// Create the result list to be 1 longer than the input.
+	result := make([]string, len(list)+1)
+
+	// Copy the whole input list into the result.
+	count := copy(result, list)
+
+	// Insert the extra item at the end.
+	result[count] = item
+
+	return result
+}
+
+// Append an (apex, jar) pair to the list.
+func (l *ConfiguredJarList) Append(apex string, jar string) ConfiguredJarList {
+	// Create a copy of the backing arrays before appending to avoid sharing backing
+	// arrays that are mutated across instances.
+	apexes := copyAndAppend(l.apexes, apex)
+	jars := copyAndAppend(l.jars, jar)
+
+	return ConfiguredJarList{apexes, jars}
+}
+
+// Append a list of (apex, jar) pairs to the list.
+func (l *ConfiguredJarList) AppendList(other *ConfiguredJarList) ConfiguredJarList {
+	apexes := make([]string, 0, l.Len()+other.Len())
+	jars := make([]string, 0, l.Len()+other.Len())
+
+	apexes = append(apexes, l.apexes...)
+	jars = append(jars, l.jars...)
+
+	apexes = append(apexes, other.apexes...)
+	jars = append(jars, other.jars...)
+
+	return ConfiguredJarList{apexes, jars}
+}
+
+// RemoveList filters out a list of (apex, jar) pairs from the receiving list of pairs.
+func (l *ConfiguredJarList) RemoveList(list ConfiguredJarList) ConfiguredJarList {
+	apexes := make([]string, 0, l.Len())
+	jars := make([]string, 0, l.Len())
+
+	for i, jar := range l.jars {
+		apex := l.apexes[i]
+		if !list.containsApexJarPair(apex, jar) {
+			apexes = append(apexes, apex)
+			jars = append(jars, jar)
+		}
+	}
+
+	return ConfiguredJarList{apexes, jars}
+}
+
+// Filter keeps the entries if a jar appears in the given list of jars to keep. Returns a new list
+// and any remaining jars that are not on this list.
+func (l *ConfiguredJarList) Filter(jarsToKeep []string) (ConfiguredJarList, []string) {
+	var apexes []string
+	var jars []string
+
+	for i, jar := range l.jars {
+		if InList(jar, jarsToKeep) {
+			apexes = append(apexes, l.apexes[i])
+			jars = append(jars, jar)
+		}
+	}
+
+	return ConfiguredJarList{apexes, jars}, RemoveListFromList(jarsToKeep, jars)
+}
+
+// CopyOfJars returns a copy of the list of strings containing jar module name
+// components.
+func (l *ConfiguredJarList) CopyOfJars() []string {
+	return CopyOf(l.jars)
+}
+
+// CopyOfApexJarPairs returns a copy of the list of strings with colon-separated
+// (apex, jar) pairs.
+func (l *ConfiguredJarList) CopyOfApexJarPairs() []string {
+	pairs := make([]string, 0, l.Len())
+
+	for i, jar := range l.jars {
+		apex := l.apexes[i]
+		pairs = append(pairs, apex+":"+jar)
+	}
+
+	return pairs
+}
+
+// BuildPaths returns a list of build paths based on the given directory prefix.
+func (l *ConfiguredJarList) BuildPaths(ctx PathContext, dir OutputPath) WritablePaths {
+	paths := make(WritablePaths, l.Len())
+	for i, jar := range l.jars {
+		paths[i] = dir.Join(ctx, ModuleStem(jar)+".jar")
+	}
+	return paths
+}
+
+// BuildPathsByModule returns a map from module name to build paths based on the given directory
+// prefix.
+func (l *ConfiguredJarList) BuildPathsByModule(ctx PathContext, dir OutputPath) map[string]WritablePath {
+	paths := map[string]WritablePath{}
+	for _, jar := range l.jars {
+		paths[jar] = dir.Join(ctx, ModuleStem(jar)+".jar")
+	}
+	return paths
+}
+
+// UnmarshalJSON converts JSON configuration from raw bytes into a
+// ConfiguredJarList structure.
+func (l *ConfiguredJarList) UnmarshalJSON(b []byte) error {
+	// Try and unmarshal into a []string each item of which contains a pair
+	// <apex>:<jar>.
+	var list []string
+	err := json.Unmarshal(b, &list)
+	if err != nil {
+		// Did not work so return
+		return err
+	}
+
+	apexes, jars, err := splitListOfPairsIntoPairOfLists(list)
+	if err != nil {
+		return err
+	}
+	l.apexes = apexes
+	l.jars = jars
+	return nil
+}
+
+func (l *ConfiguredJarList) MarshalJSON() ([]byte, error) {
+	if len(l.apexes) != len(l.jars) {
+		return nil, errors.New(fmt.Sprintf("Inconsistent ConfiguredJarList: apexes: %q, jars: %q", l.apexes, l.jars))
+	}
+
+	list := make([]string, 0, len(l.apexes))
+
+	for i := 0; i < len(l.apexes); i++ {
+		list = append(list, l.apexes[i]+":"+l.jars[i])
+	}
+
+	return json.Marshal(list)
+}
+
+// ModuleStem hardcodes the stem of framework-minus-apex to return "framework".
+//
+// TODO(b/139391334): hard coded until we find a good way to query the stem of a
+// module before any other mutators are run.
+func ModuleStem(module string) string {
+	if module == "framework-minus-apex" {
+		return "framework"
+	}
+	return module
+}
+
+// DevicePaths computes the on-device paths for the list of (apex, jar) pairs,
+// based on the operating system.
+func (l *ConfiguredJarList) DevicePaths(cfg Config, ostype OsType) []string {
+	paths := make([]string, l.Len())
+	for i, jar := range l.jars {
+		apex := l.apexes[i]
+		name := ModuleStem(jar) + ".jar"
+
+		var subdir string
+		if apex == "platform" {
+			subdir = "system/framework"
+		} else if apex == "system_ext" {
+			subdir = "system_ext/framework"
+		} else {
+			subdir = filepath.Join("apex", apex, "javalib")
+		}
+
+		if ostype.Class == Host {
+			paths[i] = filepath.Join(cfg.Getenv("OUT_DIR"), "host", cfg.PrebuiltOS(), subdir, name)
+		} else {
+			paths[i] = filepath.Join("/", subdir, name)
+		}
+	}
+	return paths
+}
+
+func (l *ConfiguredJarList) String() string {
+	var pairs []string
+	for i := 0; i < l.Len(); i++ {
+		pairs = append(pairs, l.apexes[i]+":"+l.jars[i])
+	}
+	return strings.Join(pairs, ",")
+}
+
+func splitListOfPairsIntoPairOfLists(list []string) ([]string, []string, error) {
+	// Now we need to populate this list by splitting each item in the slice of
+	// pairs and appending them to the appropriate list of apexes or jars.
+	apexes := make([]string, len(list))
+	jars := make([]string, len(list))
+
+	for i, apexjar := range list {
+		apex, jar, err := splitConfiguredJarPair(apexjar)
+		if err != nil {
+			return nil, nil, err
+		}
+		apexes[i] = apex
+		jars[i] = jar
+	}
+
+	return apexes, jars, nil
+}
+
+// Expected format for apexJarValue = <apex name>:<jar name>
+func splitConfiguredJarPair(str string) (string, string, error) {
+	pair := strings.SplitN(str, ":", 2)
+	if len(pair) == 2 {
+		apex := pair[0]
+		jar := pair[1]
+		if apex == "" {
+			return apex, jar, fmt.Errorf("invalid apex '%s' in <apex>:<jar> pair '%s', expected format: <apex>:<jar>", apex, str)
+		}
+		return apex, jar, nil
+	} else {
+		return "error-apex", "error-jar", fmt.Errorf("malformed (apex, jar) pair: '%s', expected format: <apex>:<jar>", str)
+	}
+}
+
+// EmptyConfiguredJarList returns an empty jar list.
+func EmptyConfiguredJarList() ConfiguredJarList {
+	return ConfiguredJarList{}
+}
+
+var earlyBootJarsKey = NewOnceKey("earlyBootJars")
diff --git a/android/test_config.go b/android/test_config.go
new file mode 100644
index 0000000..f36e8ba
--- /dev/null
+++ b/android/test_config.go
@@ -0,0 +1,145 @@
+// Copyright 2022 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/google/blueprint/proptools"
+)
+
+// TestConfig returns a Config object for testing.
+func TestConfig(buildDir string, env map[string]string, bp string, fs map[string][]byte) Config {
+	envCopy := make(map[string]string)
+	for k, v := range env {
+		envCopy[k] = v
+	}
+
+	// Copy the real PATH value to the test environment, it's needed by
+	// NonHermeticHostSystemTool() used in x86_darwin_host.go
+	envCopy["PATH"] = os.Getenv("PATH")
+
+	config := &config{
+		productVariables: productVariables{
+			DeviceName:                          stringPtr("test_device"),
+			DeviceProduct:                       stringPtr("test_product"),
+			Platform_sdk_version:                intPtr(30),
+			Platform_sdk_codename:               stringPtr("S"),
+			Platform_base_sdk_extension_version: intPtr(1),
+			Platform_version_active_codenames:   []string{"S", "Tiramisu"},
+			DeviceSystemSdkVersions:             []string{"14", "15"},
+			Platform_systemsdk_versions:         []string{"29", "30"},
+			AAPTConfig:                          []string{"normal", "large", "xlarge", "hdpi", "xhdpi", "xxhdpi"},
+			AAPTPreferredConfig:                 stringPtr("xhdpi"),
+			AAPTCharacteristics:                 stringPtr("nosdcard"),
+			AAPTPrebuiltDPI:                     []string{"xhdpi", "xxhdpi"},
+			UncompressPrivAppDex:                boolPtr(true),
+			ShippingApiLevel:                    stringPtr("30"),
+		},
+
+		outDir:       buildDir,
+		soongOutDir:  filepath.Join(buildDir, "soong"),
+		captureBuild: true,
+		env:          envCopy,
+
+		// Set testAllowNonExistentPaths so that test contexts don't need to specify every path
+		// passed to PathForSource or PathForModuleSrc.
+		TestAllowNonExistentPaths: true,
+
+		BazelContext:              noopBazelContext{},
+		mixedBuildDisabledModules: make(map[string]struct{}),
+		mixedBuildEnabledModules:  make(map[string]struct{}),
+	}
+	config.deviceConfig = &deviceConfig{
+		config: config,
+	}
+	config.TestProductVariables = &config.productVariables
+
+	config.mockFileSystem(bp, fs)
+
+	determineBuildOS(config)
+
+	return Config{config}
+}
+
+func modifyTestConfigToSupportArchMutator(testConfig Config) {
+	config := testConfig.config
+
+	config.Targets = map[OsType][]Target{
+		Android: []Target{
+			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", "", false},
+			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", "", false},
+		},
+		config.BuildOS: []Target{
+			{config.BuildOS, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", "", false},
+			{config.BuildOS, Arch{ArchType: X86}, NativeBridgeDisabled, "", "", false},
+		},
+	}
+
+	if runtime.GOOS == "darwin" {
+		config.Targets[config.BuildOS] = config.Targets[config.BuildOS][:1]
+	}
+
+	config.BuildOSTarget = config.Targets[config.BuildOS][0]
+	config.BuildOSCommonTarget = getCommonTargets(config.Targets[config.BuildOS])[0]
+	config.AndroidCommonTarget = getCommonTargets(config.Targets[Android])[0]
+	config.AndroidFirstDeviceTarget = FirstTarget(config.Targets[Android], "lib64", "lib32")[0]
+	config.TestProductVariables.DeviceArch = proptools.StringPtr("arm64")
+	config.TestProductVariables.DeviceArchVariant = proptools.StringPtr("armv8-a")
+	config.TestProductVariables.DeviceSecondaryArch = proptools.StringPtr("arm")
+	config.TestProductVariables.DeviceSecondaryArchVariant = proptools.StringPtr("armv7-a-neon")
+}
+
+func modifyTestConfigForMusl(config Config) {
+	delete(config.Targets, config.BuildOS)
+	config.productVariables.HostMusl = boolPtr(true)
+	determineBuildOS(config.config)
+	config.Targets[config.BuildOS] = []Target{
+		{config.BuildOS, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", "", false},
+		{config.BuildOS, Arch{ArchType: X86}, NativeBridgeDisabled, "", "", false},
+	}
+
+	config.BuildOSTarget = config.Targets[config.BuildOS][0]
+	config.BuildOSCommonTarget = getCommonTargets(config.Targets[config.BuildOS])[0]
+}
+
+// TestArchConfig returns a Config object suitable for using for tests that
+// need to run the arch mutator.
+func TestArchConfig(buildDir string, env map[string]string, bp string, fs map[string][]byte) Config {
+	testConfig := TestConfig(buildDir, env, bp, fs)
+	modifyTestConfigToSupportArchMutator(testConfig)
+	return testConfig
+}
+
+// CreateTestConfiguredJarList is a function to create ConfiguredJarList for tests.
+func CreateTestConfiguredJarList(list []string) ConfiguredJarList {
+	// Create the ConfiguredJarList in as similar way as it is created at runtime by marshalling to
+	// a json list of strings and then unmarshalling into a ConfiguredJarList instance.
+	b, err := json.Marshal(list)
+	if err != nil {
+		panic(err)
+	}
+
+	var jarList ConfiguredJarList
+	err = json.Unmarshal(b, &jarList)
+	if err != nil {
+		panic(err)
+	}
+
+	return jarList
+}
diff --git a/cmd/soong_ui/main.go b/cmd/soong_ui/main.go
index 3d18849..cb85634 100644
--- a/cmd/soong_ui/main.go
+++ b/cmd/soong_ui/main.go
@@ -268,6 +268,8 @@
 
 func dumpVar(ctx build.Context, config build.Config, args []string, _ string) {
 	flags := flag.NewFlagSet("dumpvar", flag.ExitOnError)
+	flags.SetOutput(ctx.Writer)
+
 	flags.Usage = func() {
 		fmt.Fprintf(ctx.Writer, "usage: %s --dumpvar-mode [--abs] <VAR>\n\n", os.Args[0])
 		fmt.Fprintln(ctx.Writer, "In dumpvar mode, print the value of the legacy make variable VAR to stdout")
@@ -318,6 +320,8 @@
 
 func dumpVars(ctx build.Context, config build.Config, args []string, _ string) {
 	flags := flag.NewFlagSet("dumpvars", flag.ExitOnError)
+	flags.SetOutput(ctx.Writer)
+
 	flags.Usage = func() {
 		fmt.Fprintf(ctx.Writer, "usage: %s --dumpvars-mode [--vars=\"VAR VAR ...\"]\n\n", os.Args[0])
 		fmt.Fprintln(ctx.Writer, "In dumpvars mode, dump the values of one or more legacy make variables, in")
@@ -401,6 +405,8 @@
 
 func buildActionConfig(ctx build.Context, args ...string) build.Config {
 	flags := flag.NewFlagSet("build-mode", flag.ContinueOnError)
+	flags.SetOutput(ctx.Writer)
+
 	flags.Usage = func() {
 		fmt.Fprintf(ctx.Writer, "usage: %s --build-mode --dir=<path> <build action> [<build arg 1> <build arg 2> ...]\n\n", os.Args[0])
 		fmt.Fprintln(ctx.Writer, "In build mode, build the set of modules based on the specified build")
@@ -453,21 +459,32 @@
 	const numBuildActionFlags = 2
 	if len(args) < numBuildActionFlags {
 		flags.Usage()
-		ctx.Fatalln("Improper build action arguments.")
+		ctx.Fatalln("Improper build action arguments: too few arguments")
 	}
-	flags.Parse(args[0:numBuildActionFlags])
+	parseError := flags.Parse(args[0:numBuildActionFlags])
 
 	// The next block of code is to validate that exactly one build action is set and the dir flag
 	// is specified.
-	buildActionCount := 0
+	buildActionFound := false
 	var buildAction build.BuildAction
-	for _, flag := range buildActionFlags {
-		if flag.set {
-			buildActionCount++
-			buildAction = flag.action
+	for _, f := range buildActionFlags {
+		if f.set {
+			if buildActionFound {
+				if parseError == nil {
+					//otherwise Parse() already called Usage()
+					flags.Usage()
+				}
+				ctx.Fatalf("Build action already specified, omit: --%s\n", f.name)
+			}
+			buildActionFound = true
+			buildAction = f.action
 		}
 	}
-	if buildActionCount != 1 {
+	if !buildActionFound {
+		if parseError == nil {
+			//otherwise Parse() already called Usage()
+			flags.Usage()
+		}
 		ctx.Fatalln("Build action not defined.")
 	}
 	if *dir == "" {
@@ -509,8 +526,16 @@
 // getCommand finds the appropriate command based on args[1] flag. args[0]
 // is the soong_ui filename.
 func getCommand(args []string) (*command, []string, error) {
+	listFlags := func() []string {
+		flags := make([]string, len(commands))
+		for i, c := range commands {
+			flags[i] = c.flag
+		}
+		return flags
+	}
+
 	if len(args) < 2 {
-		return nil, nil, fmt.Errorf("Too few arguments: %q", args)
+		return nil, nil, fmt.Errorf("Too few arguments: %q\nUse one of these: %q", args, listFlags())
 	}
 
 	for _, c := range commands {
@@ -518,13 +543,7 @@
 			return &c, args[2:], nil
 		}
 	}
-
-	// command not found
-	flags := make([]string, len(commands))
-	for i, c := range commands {
-		flags[i] = c.flag
-	}
-	return nil, nil, fmt.Errorf("Command not found: %q\nDid you mean one of these: %q", args, flags)
+	return nil, nil, fmt.Errorf("Command not found: %q\nDid you mean one of these: %q", args[1], listFlags())
 }
 
 // For Bazel support, this moves files and directories from e.g. out/dist/$f to DIST_DIR/$f if necessary.
diff --git a/java/lint_defaults.txt b/java/lint_defaults.txt
index e99cb05..01e7e6e 100644
--- a/java/lint_defaults.txt
+++ b/java/lint_defaults.txt
@@ -101,7 +101,6 @@
 --warning_check WrongViewCast                      # 1 occurences in 1 modules
 
 --warning_check CoarseFineLocation
---warning_check ExtraText
 --warning_check IntentFilterExportedReceiver
 --warning_check MissingInflatedId
 --warning_check NotificationPermission
diff --git a/ui/build/build.go b/ui/build/build.go
index 5b80b4d..f7a2d7b 100644
--- a/ui/build/build.go
+++ b/ui/build/build.go
@@ -201,7 +201,20 @@
 	buildLock := BecomeSingletonOrFail(ctx, config)
 	defer buildLock.Unlock()
 
+	logArgsOtherThan := func(specialTargets ...string) {
+		var ignored []string
+		for _, a := range config.Arguments() {
+			if !inList(a, specialTargets) {
+				ignored = append(ignored, a)
+			}
+		}
+		if len(ignored) > 0 {
+			ctx.Printf("ignoring arguments %q", ignored)
+		}
+	}
+
 	if inList("clean", config.Arguments()) || inList("clobber", config.Arguments()) {
+		logArgsOtherThan("clean", "clobber")
 		clean(ctx, config)
 		return
 	}
@@ -279,6 +292,7 @@
 
 	if inList("installclean", config.Arguments()) ||
 		inList("install-clean", config.Arguments()) {
+		logArgsOtherThan("installclean", "install-clean")
 		installClean(ctx, config)
 		ctx.Println("Deleted images and staging directories.")
 		return
@@ -286,6 +300,7 @@
 
 	if inList("dataclean", config.Arguments()) ||
 		inList("data-clean", config.Arguments()) {
+		logArgsOtherThan("dataclean", "data-clean")
 		dataClean(ctx, config)
 		ctx.Println("Deleted data files.")
 		return