diff --git a/core/Makefile b/core/Makefile
index 2120c95..01f27f6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3732,6 +3732,8 @@
     echo "super_$(group)_group_size=$(BOARD_$(call to-upper,$(group))_SIZE)" >> $(1); \
     $(if $(BOARD_$(call to-upper,$(group))_PARTITION_LIST), \
       echo "super_$(group)_partition_list=$(BOARD_$(call to-upper,$(group))_PARTITION_LIST)" >> $(1);))
+  $(if $(filter true,$(TARGET_USERIMAGES_SPARSE_EXT_DISABLED)), \
+    echo "build_non_sparse_super_partition=true" >> $(1))
 endef
 
 # Depending on the various images guarantees that the underlying
diff --git a/core/binary.mk b/core/binary.mk
index da188ae..f3a50f1 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -1538,11 +1538,10 @@
 
 # Add dependency of clang-tidy and clang-tidy.sh
 ifneq ($(my_tidy_checks),)
-  my_clang_tidy_programs := $(PATH_TO_CLANG_TIDY) $(PATH_TO_CLANG_TIDY_SHELL)
-  $(cpp_objects): $(intermediates)/%.o: $(my_clang_tidy_programs)
-  $(c_objects): $(intermediates)/%.o: $(my_clang_tidy_programs)
-  $(gen_cpp_objects): $(intermediates)/%.o: $(my_clang_tidy_programs)
-  $(gen_c_objects): $(intermediates)/%.o: $(my_clang_tidy_programs)
+  $(cpp_objects): $(intermediates)/%.o: $(PATH_TO_CLANG_TIDY)
+  $(c_objects): $(intermediates)/%.o: $(PATH_TO_CLANG_TIDY)
+  $(gen_cpp_objects): $(intermediates)/%.o: $(PATH_TO_CLANG_TIDY)
+  $(gen_c_objects): $(intermediates)/%.o: $(PATH_TO_CLANG_TIDY)
 endif
 
 # Move -l* entries from ldflags to ldlibs, and everything else to ldflags
diff --git a/core/cc_prebuilt_internal.mk b/core/cc_prebuilt_internal.mk
new file mode 100644
index 0000000..b936bd7
--- /dev/null
+++ b/core/cc_prebuilt_internal.mk
@@ -0,0 +1,197 @@
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# 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.
+#
+
+############################################################
+# Internal build rules for native prebuilt modules
+############################################################
+
+my_strip_module := $(firstword \
+  $(LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
+  $(LOCAL_STRIP_MODULE))
+
+ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
+  ifeq ($(LOCAL_IS_HOST_MODULE)$(my_strip_module),)
+    # Strip but not try to add debuglink
+    my_strip_module := no_debuglink
+  endif
+endif
+
+ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
+  prebuilt_module_is_a_library := true
+else
+  prebuilt_module_is_a_library :=
+endif
+
+# Don't install static libraries by default.
+ifndef LOCAL_UNINSTALLABLE_MODULE
+ifeq (STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS))
+  LOCAL_UNINSTALLABLE_MODULE := true
+endif
+endif
+
+my_check_elf_file_shared_lib_files :=
+
+ifneq ($(filter true keep_symbols no_debuglink mini-debug-info,$(my_strip_module)),)
+  ifdef LOCAL_IS_HOST_MODULE
+    $(call pretty-error,Cannot strip/pack host module)
+  endif
+  ifeq ($(filter SHARED_LIBRARIES EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
+    $(call pretty-error,Can strip/pack only shared libraries or executables)
+  endif
+  ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
+    $(call pretty-error,Cannot strip/pack scripts)
+  endif
+  # Set the arch-specific variables to set up the strip rules
+  LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) := $(my_strip_module)
+  include $(BUILD_SYSTEM)/dynamic_binary.mk
+  built_module := $(linked_module)
+
+  ifneq ($(LOCAL_SDK_VERSION),)
+    # binary.mk filters out NDK_MIGRATED_LIBS from my_shared_libs, thus those NDK libs are not added
+    # to DEPENDENCIES_ON_SHARED_LIBRARIES. Assign $(my_ndk_shared_libraries_fullpath) to
+    # my_check_elf_file_shared_lib_files so that check_elf_file.py can see those NDK stub libs.
+    my_check_elf_file_shared_lib_files := $(my_ndk_shared_libraries_fullpath)
+  endif
+else  # my_strip_module not true
+  include $(BUILD_SYSTEM)/base_rules.mk
+  built_module := $(LOCAL_BUILT_MODULE)
+
+ifdef prebuilt_module_is_a_library
+export_includes := $(intermediates)/export_includes
+export_cflags := $(foreach d,$(LOCAL_EXPORT_C_INCLUDE_DIRS),-I $(d))
+$(export_includes): PRIVATE_EXPORT_CFLAGS := $(export_cflags)
+$(export_includes): $(LOCAL_EXPORT_C_INCLUDE_DEPS)
+	@echo Export includes file: $< -- $@
+	$(hide) mkdir -p $(dir $@) && rm -f $@
+ifdef export_cflags
+	$(hide) echo "$(PRIVATE_EXPORT_CFLAGS)" >$@
+else
+	$(hide) touch $@
+endif
+export_cflags :=
+
+include $(BUILD_SYSTEM)/allowed_ndk_types.mk
+
+ifdef LOCAL_SDK_VERSION
+my_link_type := native:ndk:$(my_ndk_stl_family):$(my_ndk_stl_link_type)
+else ifdef LOCAL_USE_VNDK
+    _name := $(patsubst %.vendor,%,$(LOCAL_MODULE))
+    ifneq ($(filter $(_name),$(VNDK_CORE_LIBRARIES) $(VNDK_SAMEPROCESS_LIBRARIES) $(LLNDK_LIBRARIES)),)
+        ifeq ($(filter $(_name),$(VNDK_PRIVATE_LIBRARIES)),)
+            my_link_type := native:vndk
+        else
+            my_link_type := native:vndk_private
+        endif
+    else
+        my_link_type := native:vendor
+    endif
+else ifneq ($(filter $(TARGET_RECOVERY_OUT)/%,$(LOCAL_MODULE_PATH)),)
+my_link_type := native:recovery
+else
+my_link_type := native:platform
+endif
+
+# TODO: check dependencies of prebuilt files
+my_link_deps :=
+
+my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)
+my_common :=
+include $(BUILD_SYSTEM)/link_type.mk
+endif  # prebuilt_module_is_a_library
+
+# The real dependency will be added after all Android.mks are loaded and the install paths
+# of the shared libraries are determined.
+ifdef LOCAL_INSTALLED_MODULE
+ifdef LOCAL_IS_HOST_MODULE
+    ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
+        my_system_shared_libraries :=
+    else
+        my_system_shared_libraries := $(LOCAL_SYSTEM_SHARED_LIBRARIES)
+    endif
+else
+    ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
+        my_system_shared_libraries := libc libm libdl
+    else
+        my_system_shared_libraries := $(LOCAL_SYSTEM_SHARED_LIBRARIES)
+        my_system_shared_libraries := $(patsubst libc,libc libdl,$(my_system_shared_libraries))
+    endif
+endif
+
+my_shared_libraries := \
+    $(filter-out $(my_system_shared_libraries),$(LOCAL_SHARED_LIBRARIES)) \
+    $(my_system_shared_libraries)
+
+ifdef my_shared_libraries
+# Extra shared libraries introduced by LOCAL_CXX_STL.
+include $(BUILD_SYSTEM)/cxx_stl_setup.mk
+ifdef LOCAL_USE_VNDK
+  my_shared_libraries := $(foreach l,$(my_shared_libraries),\
+    $(if $(SPLIT_VENDOR.SHARED_LIBRARIES.$(l)),$(l).vendor,$(l)))
+endif
+$(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)DEPENDENCIES_ON_SHARED_LIBRARIES += \
+  $(my_register_name):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(my_shared_libraries))
+endif
+endif  # my_shared_libraries
+
+# We need to enclose the above export_includes and my_built_shared_libraries in
+# "my_strip_module not true" because otherwise the rules are defined in dynamic_binary.mk.
+endif  # my_strip_module not true
+
+
+# Check prebuilt ELF binaries.
+include $(BUILD_SYSTEM)/check_elf_file.mk
+
+ifeq ($(NATIVE_COVERAGE),true)
+ifneq (,$(strip $(LOCAL_PREBUILT_COVERAGE_ARCHIVE)))
+  $(eval $(call copy-one-file,$(LOCAL_PREBUILT_COVERAGE_ARCHIVE),$(intermediates)/$(LOCAL_MODULE).gcnodir))
+  ifneq ($(LOCAL_UNINSTALLABLE_MODULE),true)
+    ifdef LOCAL_IS_HOST_MODULE
+      my_coverage_path := $($(my_prefix)OUT_COVERAGE)/$(patsubst $($(my_prefix)OUT)/%,%,$(my_module_path))
+    else
+      my_coverage_path := $(TARGET_OUT_COVERAGE)/$(patsubst $(PRODUCT_OUT)/%,%,$(my_module_path))
+    endif
+    my_coverage_path := $(my_coverage_path)/$(patsubst %.so,%,$(my_installed_module_stem)).gcnodir
+    $(eval $(call copy-one-file,$(LOCAL_PREBUILT_COVERAGE_ARCHIVE),$(my_coverage_path)))
+    $(LOCAL_BUILT_MODULE): $(my_coverage_path)
+  endif
+else
+# Coverage information is needed when static lib is a dependency of another
+# coverage-enabled module.
+ifeq (STATIC_LIBRARIES, $(LOCAL_MODULE_CLASS))
+GCNO_ARCHIVE := $(LOCAL_MODULE).gcnodir
+$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_ALL_OBJECTS :=
+$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_ALL_WHOLE_STATIC_LIBRARIES :=
+$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_PREFIX := $(my_prefix)
+$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_2ND_ARCH_VAR_PREFIX := $(LOCAL_2ND_ARCH_VAR_PREFIX)
+$(intermediates)/$(GCNO_ARCHIVE) :
+	$(transform-o-to-static-lib)
+endif
+endif
+endif
+
+ifneq ($(filter init%rc,$(notdir $(LOCAL_INSTALLED_MODULE)))$(filter %/etc/init,$(dir $(LOCAL_INSTALLED_MODULE))),)
+  $(eval $(call copy-init-script-file-checked,$(my_prebuilt_src_file),$(built_module)))
+else ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
+$(built_module) : $(my_prebuilt_src_file)
+	$(transform-prebuilt-to-target-strip-comments)
+else
+$(built_module) : $(my_prebuilt_src_file)
+	$(transform-prebuilt-to-target)
+endif
+ifneq ($(filter EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
+	$(hide) chmod +x $@
+endif
+
diff --git a/core/config.mk b/core/config.mk
index 15bafeb..ed41d57 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -615,8 +615,6 @@
 
 EXTRACT_KERNEL := build/make/tools/extract_kernel.py
 
-COLUMN:= column
-
 USE_OPENJDK9 := true
 
 ifeq ($(EXPERIMENTAL_USE_OPENJDK9),)
diff --git a/core/definitions.mk b/core/definitions.mk
index bb26de6..4e7d893 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1137,10 +1137,9 @@
 	$(PRIVATE_CPPFLAGS_NO_OVERRIDE)
 endef
 
-# PATH_TO_CLANG_TIDY_SHELL is defined in build/soong
+# PATH_TO_CLANG_TIDY is defined in build/soong
 define call-clang-tidy
-CLANG_TIDY=$(PATH_TO_CLANG_TIDY) \
-  $(PATH_TO_CLANG_TIDY_SHELL) \
+$(PATH_TO_CLANG_TIDY) \
   $(PRIVATE_TIDY_FLAGS) \
   -checks=$(PRIVATE_TIDY_CHECKS)
 endef
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index d43158e..8017486 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -13,6 +13,10 @@
 install-on-system-other = $(filter-out $(PRODUCT_DEXPREOPT_SPEED_APPS) $(PRODUCT_SYSTEM_SERVER_APPS),$(basename $(notdir $(filter $(foreach f,$(SYSTEM_OTHER_ODEX_FILTER),$(TARGET_OUT)/$(f)),$(1)))))
 endif
 
+# We want to install the profile even if we are not using preopt since it is required to generate
+# the image on the device.
+ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(DEXPREOPT_IMAGE_PROFILE_BUILT_INSTALLED),$(PRODUCT_OUT))
+
 # Install boot images. Note that there can be multiple.
 DEFAULT_DEX_PREOPT_INSTALLED_IMAGE :=
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEFAULT_DEX_PREOPT_INSTALLED_IMAGE :=
diff --git a/core/dex_preopt_config.mk b/core/dex_preopt_config.mk
index 13e4634..a494991 100644
--- a/core/dex_preopt_config.mk
+++ b/core/dex_preopt_config.mk
@@ -91,6 +91,7 @@
   $(call add_json_list, DisablePreoptModules,               $(DEXPREOPT_DISABLED_MODULES))
   $(call add_json_bool, OnlyPreoptBootImageAndSystemServer, $(filter true,$(WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY)))
   $(call add_json_bool, GenerateApexImage,                  $(filter true,$(DEXPREOPT_GENERATE_APEX_IMAGE)))
+  $(call add_json_bool, UseApexImage,                       $(filter true,$(DEXPREOPT_USE_APEX_IMAGE)))
   $(call add_json_bool, DontUncompressPrivAppsDex,          $(filter true,$(DONT_UNCOMPRESS_PRIV_APPS_DEXS)))
   $(call add_json_list, ModulesLoadedByPrivilegedModules,   $(PRODUCT_LOADED_BY_PRIVILEGED_MODULES))
   $(call add_json_bool, HasSystemOther,                     $(BOARD_USES_SYSTEM_OTHER_ODEX))
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index edd82df..85f2f3b 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -5,11 +5,6 @@
 #
 ####################################
 
-# We want to install the profile even if we are not using preopt since it is required to generate
-# the image on the device.
-my_installed := $(call copy-many-files,$(DEXPREOPT_IMAGE_PROFILE_BUILT_INSTALLED),$(PRODUCT_OUT))
-ALL_DEFAULT_INSTALLED_MODULES += $(my_installed)
-
 # Install primary arch vdex files into a shared location, and then symlink them to both the primary
 # and secondary arch directories.
 my_vdex_copy_pairs := $(DEXPREOPT_IMAGE_VDEX_BUILT_INSTALLED_$(my_boot_image_name)_$(TARGET_ARCH))
diff --git a/core/java.mk b/core/java.mk
index fc5a8bc..c3787ae 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -395,6 +395,13 @@
   # that would break apps that use APIs removed from the current SDK.
   my_proguard_sdk_raise := $(call java-lib-header-files,$(TARGET_DEFAULT_BOOTCLASSPATH_LIBRARIES) $(TARGET_DEFAULT_JAVA_LIBRARIES))
 endif
+ifdef BOARD_SYSTEMSDK_VERSIONS
+ifneq (,$(filter true,$(LOCAL_VENDOR_MODULE) $(LOCAL_ODM_MODULE) $(LOCAL_PROPRIETARY_MODULE)))
+  # But for vendor or odm apks, don't raise SDK as the apks are required to
+  # use SDK APIs only
+  my_proguard_sdk_raise :=
+endif
+endif
 endif
 
 legacy_proguard_flags := $(addprefix -libraryjars ,$(my_proguard_sdk_raise) \
diff --git a/core/java_prebuilt_internal.mk b/core/java_prebuilt_internal.mk
new file mode 100644
index 0000000..8a919ff
--- /dev/null
+++ b/core/java_prebuilt_internal.mk
@@ -0,0 +1,247 @@
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# 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.
+#
+
+############################################################
+# Internal build rules for JAVA_LIBRARIES prebuilt modules
+############################################################
+
+ifneq (JAVA_LIBRARIES,$(LOCAL_MODULE_CLASS))
+$(call pretty-error,java_prebuilt_internal.mk is for JAVA_LIBRARIES modules only)
+endif
+
+include $(BUILD_SYSTEM)/base_rules.mk
+built_module := $(LOCAL_BUILT_MODULE)
+
+ifeq (,$(LOCAL_IS_HOST_MODULE)$(filter true,$(LOCAL_UNINSTALLABLE_MODULE)))
+  prebuilt_module_is_dex_javalib := true
+else
+  prebuilt_module_is_dex_javalib :=
+endif
+
+ifeq ($(prebuilt_module_is_dex_javalib),true)
+my_dex_jar := $(my_prebuilt_src_file)
+# This is a target shared library, i.e. a jar with classes.dex.
+
+ifneq ($(filter $(LOCAL_MODULE),$(PRODUCT_BOOT_JARS)),)
+  $(call pretty-error,Modules in PRODUCT_BOOT_JARS must be defined in Android.bp files)
+endif
+
+#######################################
+# defines built_odex along with rule to install odex
+include $(BUILD_SYSTEM)/dex_preopt_odex_install.mk
+#######################################
+ifdef LOCAL_DEX_PREOPT
+
+$(built_module): PRIVATE_STRIP_SCRIPT := $(intermediates)/strip.sh
+$(built_module): $(intermediates)/strip.sh
+$(built_module): | $(DEXPREOPT_STRIP_DEPS)
+$(built_module): .KATI_DEPFILE := $(built_module).d
+$(built_module): $(my_prebuilt_src_file)
+	$(PRIVATE_STRIP_SCRIPT) $< $@
+
+else # ! LOCAL_DEX_PREOPT
+$(built_module) : $(my_prebuilt_src_file)
+	$(call copy-file-to-target)
+endif # LOCAL_DEX_PREOPT
+
+else  # ! prebuilt_module_is_dex_javalib
+$(built_module) : $(my_prebuilt_src_file)
+	$(transform-prebuilt-to-target)
+endif # ! prebuilt_module_is_dex_javalib
+
+my_src_jar := $(my_prebuilt_src_file)
+
+ifdef LOCAL_IS_HOST_MODULE
+# for host java libraries deps should be in the common dir, so we make a copy in
+# the common dir.
+common_classes_jar := $(intermediates.COMMON)/classes.jar
+common_header_jar := $(intermediates.COMMON)/classes-header.jar
+
+$(common_classes_jar): PRIVATE_MODULE := $(LOCAL_MODULE)
+$(common_classes_jar): PRIVATE_PREFIX := $(my_prefix)
+
+$(common_classes_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+
+ifneq ($(TURBINE_ENABLED),false)
+$(common_header_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+endif
+
+else # !LOCAL_IS_HOST_MODULE
+# for target java libraries, the LOCAL_BUILT_MODULE is in a product-specific dir,
+# while the deps should be in the common dir, so we make a copy in the common dir.
+common_classes_jar := $(intermediates.COMMON)/classes.jar
+common_header_jar := $(intermediates.COMMON)/classes-header.jar
+common_classes_pre_proguard_jar := $(intermediates.COMMON)/classes-pre-proguard.jar
+common_javalib_jar := $(intermediates.COMMON)/javalib.jar
+
+$(common_classes_jar) $(common_classes_pre_proguard_jar) $(common_javalib_jar): PRIVATE_MODULE := $(LOCAL_MODULE)
+$(common_classes_jar) $(common_classes_pre_proguard_jar) $(common_javalib_jar): PRIVATE_PREFIX := $(my_prefix)
+
+ifeq ($(LOCAL_SDK_VERSION),system_current)
+my_link_type := java:system
+else ifneq (,$(call has-system-sdk-version,$(LOCAL_SDK_VERSION)))
+my_link_type := java:system
+else ifeq ($(LOCAL_SDK_VERSION),core_current)
+my_link_type := java:core
+else ifneq ($(LOCAL_SDK_VERSION),)
+my_link_type := java:sdk
+else
+my_link_type := java:platform
+endif
+
+# TODO: check dependencies of prebuilt files
+my_link_deps :=
+
+my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)
+my_common := COMMON
+include $(BUILD_SYSTEM)/link_type.mk
+
+ifeq ($(prebuilt_module_is_dex_javalib),true)
+# For prebuilt shared Java library we don't have classes.jar.
+$(common_javalib_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+
+else  # ! prebuilt_module_is_dex_javalib
+
+my_src_aar := $(filter %.aar, $(my_prebuilt_src_file))
+ifneq ($(my_src_aar),)
+# This is .aar file, archive of classes.jar and Android resources.
+
+# run Jetifier if needed
+LOCAL_JETIFIER_INPUT_FILE := $(my_src_aar)
+include $(BUILD_SYSTEM)/jetifier.mk
+my_src_aar := $(LOCAL_JETIFIER_OUTPUT_FILE)
+
+my_src_jar := $(intermediates.COMMON)/aar/classes.jar
+my_src_proguard_options := $(intermediates.COMMON)/aar/proguard.txt
+my_src_android_manifest := $(intermediates.COMMON)/aar/AndroidManifest.xml
+
+$(my_src_jar) : .KATI_IMPLICIT_OUTPUTS := $(my_src_proguard_options)
+$(my_src_jar) : .KATI_IMPLICIT_OUTPUTS += $(my_src_android_manifest)
+$(my_src_jar) : $(my_src_aar)
+	$(hide) rm -rf $(dir $@) && mkdir -p $(dir $@) $(dir $@)/res
+	$(hide) unzip -qo -d $(dir $@) $<
+	# Make sure the extracted classes.jar has a new timestamp.
+	$(hide) touch $@
+	# Make sure the proguard and AndroidManifest.xml files exist
+	# and have a new timestamp.
+	$(hide) touch $(dir $@)/proguard.txt
+	$(hide) touch $(dir $@)/AndroidManifest.xml
+
+my_prebuilt_android_manifest := $(intermediates.COMMON)/manifest/AndroidManifest.xml
+$(eval $(call copy-one-file,$(my_src_android_manifest),$(my_prebuilt_android_manifest)))
+$(call add-dependency,$(LOCAL_BUILT_MODULE),$(my_prebuilt_android_manifest))
+
+else
+
+# run Jetifier if needed
+LOCAL_JETIFIER_INPUT_FILE := $(my_src_jar)
+include $(BUILD_SYSTEM)/jetifier.mk
+my_src_jar := $(LOCAL_JETIFIER_OUTPUT_FILE)
+
+endif
+
+$(common_classes_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+
+ifneq ($(TURBINE_ENABLED),false)
+$(common_header_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+endif
+
+$(common_classes_pre_proguard_jar) : $(my_src_jar)
+	$(transform-prebuilt-to-target)
+
+$(common_javalib_jar) : $(common_classes_jar)
+	$(transform-prebuilt-to-target)
+
+include $(BUILD_SYSTEM)/force_aapt2.mk
+
+ifdef LOCAL_AAPT2_ONLY
+LOCAL_USE_AAPT2 := true
+endif
+
+ifeq ($(LOCAL_USE_AAPT2),true)
+ifneq ($(my_src_aar),)
+
+$(intermediates.COMMON)/export_proguard_flags : $(my_src_proguard_options)
+	$(transform-prebuilt-to-target)
+
+LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
+ifeq ($(LOCAL_SDK_RES_VERSION),)
+  LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
+endif
+
+framework_res_package_export :=
+# Please refer to package.mk
+ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
+ifneq ($(filter-out current system_current test_current,$(LOCAL_SDK_RES_VERSION))$(if $(TARGET_BUILD_APPS),$(filter current system_current test_current,$(LOCAL_SDK_RES_VERSION))),)
+framework_res_package_export := \
+    $(call resolve-prebuilt-sdk-jar-path,$(LOCAL_SDK_RES_VERSION))
+else
+framework_res_package_export := \
+    $(call intermediates-dir-for,APPS,framework-res,,COMMON)/package-export.apk
+endif
+endif
+
+my_res_package := $(intermediates.COMMON)/package-res.apk
+
+# We needed only very few PRIVATE variables and aapt2.mk input variables. Reset the unnecessary ones.
+$(my_res_package): PRIVATE_AAPT2_CFLAGS :=
+$(my_res_package): PRIVATE_AAPT_FLAGS := --static-lib --no-static-lib-packages --auto-add-overlay
+$(my_res_package): PRIVATE_ANDROID_MANIFEST := $(my_src_android_manifest)
+$(my_res_package): PRIVATE_AAPT_INCLUDES := $(framework_res_package_export)
+$(my_res_package): PRIVATE_SOURCE_INTERMEDIATES_DIR :=
+$(my_res_package): PRIVATE_PROGUARD_OPTIONS_FILE :=
+$(my_res_package): PRIVATE_DEFAULT_APP_TARGET_SDK :=
+$(my_res_package): PRIVATE_DEFAULT_APP_TARGET_SDK :=
+$(my_res_package): PRIVATE_PRODUCT_AAPT_CONFIG :=
+$(my_res_package): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
+$(my_res_package): PRIVATE_TARGET_AAPT_CHARACTERISTICS :=
+$(my_res_package) : $(framework_res_package_export)
+$(my_res_package) : $(my_src_android_manifest)
+
+full_android_manifest :=
+my_res_resources :=
+my_overlay_resources :=
+my_compiled_res_base_dir := $(intermediates.COMMON)/flat-res
+R_file_stamp :=
+proguard_options_file :=
+my_generated_res_dirs := $(intermediates.COMMON)/aar/res
+my_generated_res_dirs_deps := $(my_src_jar)
+include $(BUILD_SYSTEM)/aapt2.mk
+
+# Make sure my_res_package is created when you run mm/mmm.
+$(built_module) : $(my_res_package)
+endif  # $(my_src_aar)
+endif  # LOCAL_USE_AAPT2
+# make sure the classes.jar and javalib.jar are built before $(LOCAL_BUILT_MODULE)
+$(built_module) : $(common_javalib_jar)
+
+my_exported_sdk_libs_file := $(intermediates.COMMON)/exported-sdk-libs
+$(my_exported_sdk_libs_file): PRIVATE_EXPORTED_SDK_LIBS := $(LOCAL_EXPORT_SDK_LIBRARIES)
+$(my_exported_sdk_libs_file):
+	@echo "Export SDK libs $@"
+	$(hide) mkdir -p $(dir $@) && rm -f $@
+	$(if $(PRIVATE_EXPORTED_SDK_LIBS),\
+		$(hide) echo $(PRIVATE_EXPORTED_SDK_LIBS) | tr ' ' '\n' > $@,\
+		$(hide) touch $@)
+
+endif # ! prebuilt_module_is_dex_javalib
+endif # LOCAL_IS_HOST_MODULE is not set
+
diff --git a/core/main.mk b/core/main.mk
index 990d255..25dd24b 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1668,7 +1668,7 @@
 modules:
 	@echo "Available sub-modules:"
 	@echo "$(call module-names-for-tag-list,$(ALL_MODULE_TAGS))" | \
-	      tr -s ' ' '\n' | sort -u | $(COLUMN)
+	      tr -s ' ' '\n' | sort -u
 
 .PHONY: dump-files
 dump-files:
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index e505945..f5b92fe 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -32,421 +32,27 @@
   my_prebuilt_src_file := $(LOCAL_PATH)/$(LOCAL_SRC_FILES)
   LOCAL_SRC_FILES :=
 else ifdef LOCAL_REPLACE_PREBUILT_APK_INSTALLED
-  # This is handled specially below
+  # This is handled specially in app_prebuilt_internal.mk
 else
   $(call pretty-error,No source files specified)
 endif
 
 LOCAL_CHECKED_MODULE := $(my_prebuilt_src_file)
 
-ifeq (APPS,$(LOCAL_MODULE_CLASS))
-include $(BUILD_SYSTEM)/app_prebuilt_internal.mk
-else
-#
-# Non-APPS prebuilt modules handling almost to the end of the file
-#
-
-my_strip_module := $(firstword \
-  $(LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
-  $(LOCAL_STRIP_MODULE))
-
-ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
-  ifeq ($(LOCAL_IS_HOST_MODULE)$(my_strip_module),)
-    # Strip but not try to add debuglink
-    my_strip_module := no_debuglink
-  endif
-endif
-
-ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
-  prebuilt_module_is_a_library := true
-else
-  prebuilt_module_is_a_library :=
-endif
-
-# Don't install static libraries by default.
-ifndef LOCAL_UNINSTALLABLE_MODULE
-ifeq (STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS))
-  LOCAL_UNINSTALLABLE_MODULE := true
-endif
-endif
-
-ifeq (JAVA_LIBRARIES,$(LOCAL_IS_HOST_MODULE)$(LOCAL_MODULE_CLASS)$(filter true,$(LOCAL_UNINSTALLABLE_MODULE)))
-  prebuilt_module_is_dex_javalib := true
-else
-  prebuilt_module_is_dex_javalib :=
-endif
-
+ifneq (APPS,$(LOCAL_MODULE_CLASS))
 ifdef LOCAL_COMPRESSED_MODULE
 $(error $(LOCAL_MODULE) : LOCAL_COMPRESSED_MODULE can only be defined for module class APPS)
 endif  # LOCAL_COMPRESSED_MODULE
+endif  # APPS
 
-my_check_elf_file_shared_lib_files :=
-
-ifneq ($(filter true keep_symbols no_debuglink mini-debug-info,$(my_strip_module)),)
-  ifdef LOCAL_IS_HOST_MODULE
-    $(call pretty-error,Cannot strip/pack host module)
-  endif
-  ifeq ($(filter SHARED_LIBRARIES EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
-    $(call pretty-error,Can strip/pack only shared libraries or executables)
-  endif
-  ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
-    $(call pretty-error,Cannot strip/pack scripts)
-  endif
-  # Set the arch-specific variables to set up the strip rules
-  LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH) := $(my_strip_module)
-  include $(BUILD_SYSTEM)/dynamic_binary.mk
-  built_module := $(linked_module)
-
-  ifneq ($(LOCAL_SDK_VERSION),)
-    # binary.mk filters out NDK_MIGRATED_LIBS from my_shared_libs, thus those NDK libs are not added
-    # to DEPENDENCIES_ON_SHARED_LIBRARIES. Assign $(my_ndk_shared_libraries_fullpath) to
-    # my_check_elf_file_shared_lib_files so that check_elf_file.py can see those NDK stub libs.
-    my_check_elf_file_shared_lib_files := $(my_ndk_shared_libraries_fullpath)
-  endif
-else  # my_strip_module not true
-  include $(BUILD_SYSTEM)/base_rules.mk
-  built_module := $(LOCAL_BUILT_MODULE)
-
-ifdef prebuilt_module_is_a_library
-export_includes := $(intermediates)/export_includes
-export_cflags := $(foreach d,$(LOCAL_EXPORT_C_INCLUDE_DIRS),-I $(d))
-$(export_includes): PRIVATE_EXPORT_CFLAGS := $(export_cflags)
-$(export_includes): $(LOCAL_EXPORT_C_INCLUDE_DEPS)
-	@echo Export includes file: $< -- $@
-	$(hide) mkdir -p $(dir $@) && rm -f $@
-ifdef export_cflags
-	$(hide) echo "$(PRIVATE_EXPORT_CFLAGS)" >$@
+ifeq (APPS,$(LOCAL_MODULE_CLASS))
+  include $(BUILD_SYSTEM)/app_prebuilt_internal.mk
+else ifeq (JAVA_LIBRARIES,$(LOCAL_MODULE_CLASS))
+  include $(BUILD_SYSTEM)/java_prebuilt_internal.mk
 else
-	$(hide) touch $@
+  # TODO(jungjw): Check LOCAL_MODULE_CLASS value and generate an error for unexpected ones.
+  include $(BUILD_SYSTEM)/cc_prebuilt_internal.mk
 endif
-export_cflags :=
-
-include $(BUILD_SYSTEM)/allowed_ndk_types.mk
-
-ifdef LOCAL_SDK_VERSION
-my_link_type := native:ndk:$(my_ndk_stl_family):$(my_ndk_stl_link_type)
-else ifdef LOCAL_USE_VNDK
-    _name := $(patsubst %.vendor,%,$(LOCAL_MODULE))
-    ifneq ($(filter $(_name),$(VNDK_CORE_LIBRARIES) $(VNDK_SAMEPROCESS_LIBRARIES) $(LLNDK_LIBRARIES)),)
-        ifeq ($(filter $(_name),$(VNDK_PRIVATE_LIBRARIES)),)
-            my_link_type := native:vndk
-        else
-            my_link_type := native:vndk_private
-        endif
-    else
-        my_link_type := native:vendor
-    endif
-else ifneq ($(filter $(TARGET_RECOVERY_OUT)/%,$(LOCAL_MODULE_PATH)),)
-my_link_type := native:recovery
-else
-my_link_type := native:platform
-endif
-
-# TODO: check dependencies of prebuilt files
-my_link_deps :=
-
-my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)
-my_common :=
-include $(BUILD_SYSTEM)/link_type.mk
-endif  # prebuilt_module_is_a_library
-
-# The real dependency will be added after all Android.mks are loaded and the install paths
-# of the shared libraries are determined.
-ifdef LOCAL_INSTALLED_MODULE
-ifdef LOCAL_IS_HOST_MODULE
-    ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
-        my_system_shared_libraries :=
-    else
-        my_system_shared_libraries := $(LOCAL_SYSTEM_SHARED_LIBRARIES)
-    endif
-else
-    ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
-        my_system_shared_libraries := libc libm libdl
-    else
-        my_system_shared_libraries := $(LOCAL_SYSTEM_SHARED_LIBRARIES)
-        my_system_shared_libraries := $(patsubst libc,libc libdl,$(my_system_shared_libraries))
-    endif
-endif
-
-my_shared_libraries := \
-    $(filter-out $(my_system_shared_libraries),$(LOCAL_SHARED_LIBRARIES)) \
-    $(my_system_shared_libraries)
-
-ifdef my_shared_libraries
-# Extra shared libraries introduced by LOCAL_CXX_STL.
-include $(BUILD_SYSTEM)/cxx_stl_setup.mk
-ifdef LOCAL_USE_VNDK
-  my_shared_libraries := $(foreach l,$(my_shared_libraries),\
-    $(if $(SPLIT_VENDOR.SHARED_LIBRARIES.$(l)),$(l).vendor,$(l)))
-endif
-$(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)DEPENDENCIES_ON_SHARED_LIBRARIES += \
-  $(my_register_name):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(my_shared_libraries))
-endif
-endif  # my_shared_libraries
-
-# We need to enclose the above export_includes and my_built_shared_libraries in
-# "my_strip_module not true" because otherwise the rules are defined in dynamic_binary.mk.
-endif  # my_strip_module not true
-
-# Check prebuilt ELF binaries.
-include $(BUILD_SYSTEM)/check_elf_file.mk
-
-ifeq ($(NATIVE_COVERAGE),true)
-ifneq (,$(strip $(LOCAL_PREBUILT_COVERAGE_ARCHIVE)))
-  $(eval $(call copy-one-file,$(LOCAL_PREBUILT_COVERAGE_ARCHIVE),$(intermediates)/$(LOCAL_MODULE).gcnodir))
-  ifneq ($(LOCAL_UNINSTALLABLE_MODULE),true)
-    ifdef LOCAL_IS_HOST_MODULE
-      my_coverage_path := $($(my_prefix)OUT_COVERAGE)/$(patsubst $($(my_prefix)OUT)/%,%,$(my_module_path))
-    else
-      my_coverage_path := $(TARGET_OUT_COVERAGE)/$(patsubst $(PRODUCT_OUT)/%,%,$(my_module_path))
-    endif
-    my_coverage_path := $(my_coverage_path)/$(patsubst %.so,%,$(my_installed_module_stem)).gcnodir
-    $(eval $(call copy-one-file,$(LOCAL_PREBUILT_COVERAGE_ARCHIVE),$(my_coverage_path)))
-    $(LOCAL_BUILT_MODULE): $(my_coverage_path)
-  endif
-else
-# Coverage information is needed when static lib is a dependency of another
-# coverage-enabled module.
-ifeq (STATIC_LIBRARIES, $(LOCAL_MODULE_CLASS))
-GCNO_ARCHIVE := $(LOCAL_MODULE).gcnodir
-$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_ALL_OBJECTS :=
-$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_ALL_WHOLE_STATIC_LIBRARIES :=
-$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_PREFIX := $(my_prefix)
-$(intermediates)/$(GCNO_ARCHIVE) : PRIVATE_2ND_ARCH_VAR_PREFIX := $(LOCAL_2ND_ARCH_VAR_PREFIX)
-$(intermediates)/$(GCNO_ARCHIVE) :
-	$(transform-o-to-static-lib)
-endif
-endif
-endif
-
-ifeq ($(prebuilt_module_is_dex_javalib),true)
-my_dex_jar := $(my_prebuilt_src_file)
-# This is a target shared library, i.e. a jar with classes.dex.
-
-ifneq ($(filter $(LOCAL_MODULE),$(PRODUCT_BOOT_JARS)),)
-  $(call pretty-error,Modules in PRODUCT_BOOT_JARS must be defined in Android.bp files)
-endif
-
-#######################################
-# defines built_odex along with rule to install odex
-include $(BUILD_SYSTEM)/dex_preopt_odex_install.mk
-#######################################
-ifdef LOCAL_DEX_PREOPT
-
-$(built_module): PRIVATE_STRIP_SCRIPT := $(intermediates)/strip.sh
-$(built_module): $(intermediates)/strip.sh
-$(built_module): | $(DEXPREOPT_STRIP_DEPS)
-$(built_module): .KATI_DEPFILE := $(built_module).d
-$(built_module): $(my_prebuilt_src_file)
-	$(PRIVATE_STRIP_SCRIPT) $< $@
-
-else # ! LOCAL_DEX_PREOPT
-$(built_module) : $(my_prebuilt_src_file)
-	$(call copy-file-to-target)
-endif # LOCAL_DEX_PREOPT
-
-else  # ! prebuilt_module_is_dex_javalib
-ifneq ($(filter init%rc,$(notdir $(LOCAL_INSTALLED_MODULE)))$(filter %/etc/init,$(dir $(LOCAL_INSTALLED_MODULE))),)
-  $(eval $(call copy-init-script-file-checked,$(my_prebuilt_src_file),$(built_module)))
-else ifneq ($(LOCAL_PREBUILT_STRIP_COMMENTS),)
-$(built_module) : $(my_prebuilt_src_file)
-	$(transform-prebuilt-to-target-strip-comments)
-else
-$(built_module) : $(my_prebuilt_src_file)
-	$(transform-prebuilt-to-target)
-endif
-ifneq ($(filter EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
-	$(hide) chmod +x $@
-endif
-endif # ! prebuilt_module_is_dex_javalib
-
-ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
-my_src_jar := $(my_prebuilt_src_file)
-
-ifdef LOCAL_IS_HOST_MODULE
-# for host java libraries deps should be in the common dir, so we make a copy in
-# the common dir.
-common_classes_jar := $(intermediates.COMMON)/classes.jar
-common_header_jar := $(intermediates.COMMON)/classes-header.jar
-
-$(common_classes_jar): PRIVATE_MODULE := $(LOCAL_MODULE)
-$(common_classes_jar): PRIVATE_PREFIX := $(my_prefix)
-
-$(common_classes_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-
-ifneq ($(TURBINE_ENABLED),false)
-$(common_header_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-endif
-
-else # !LOCAL_IS_HOST_MODULE
-# for target java libraries, the LOCAL_BUILT_MODULE is in a product-specific dir,
-# while the deps should be in the common dir, so we make a copy in the common dir.
-common_classes_jar := $(intermediates.COMMON)/classes.jar
-common_header_jar := $(intermediates.COMMON)/classes-header.jar
-common_classes_pre_proguard_jar := $(intermediates.COMMON)/classes-pre-proguard.jar
-common_javalib_jar := $(intermediates.COMMON)/javalib.jar
-
-$(common_classes_jar) $(common_classes_pre_proguard_jar) $(common_javalib_jar): PRIVATE_MODULE := $(LOCAL_MODULE)
-$(common_classes_jar) $(common_classes_pre_proguard_jar) $(common_javalib_jar): PRIVATE_PREFIX := $(my_prefix)
-
-ifeq ($(LOCAL_SDK_VERSION),system_current)
-my_link_type := java:system
-else ifneq (,$(call has-system-sdk-version,$(LOCAL_SDK_VERSION)))
-my_link_type := java:system
-else ifeq ($(LOCAL_SDK_VERSION),core_current)
-my_link_type := java:core
-else ifneq ($(LOCAL_SDK_VERSION),)
-my_link_type := java:sdk
-else
-my_link_type := java:platform
-endif
-
-# TODO: check dependencies of prebuilt files
-my_link_deps :=
-
-my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)
-my_common := COMMON
-include $(BUILD_SYSTEM)/link_type.mk
-
-ifeq ($(prebuilt_module_is_dex_javalib),true)
-# For prebuilt shared Java library we don't have classes.jar.
-$(common_javalib_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-
-else  # ! prebuilt_module_is_dex_javalib
-
-my_src_aar := $(filter %.aar, $(my_prebuilt_src_file))
-ifneq ($(my_src_aar),)
-# This is .aar file, archive of classes.jar and Android resources.
-
-# run Jetifier if needed
-LOCAL_JETIFIER_INPUT_FILE := $(my_src_aar)
-include $(BUILD_SYSTEM)/jetifier.mk
-my_src_aar := $(LOCAL_JETIFIER_OUTPUT_FILE)
-
-my_src_jar := $(intermediates.COMMON)/aar/classes.jar
-my_src_proguard_options := $(intermediates.COMMON)/aar/proguard.txt
-my_src_android_manifest := $(intermediates.COMMON)/aar/AndroidManifest.xml
-
-$(my_src_jar) : .KATI_IMPLICIT_OUTPUTS := $(my_src_proguard_options)
-$(my_src_jar) : .KATI_IMPLICIT_OUTPUTS += $(my_src_android_manifest)
-$(my_src_jar) : $(my_src_aar)
-	$(hide) rm -rf $(dir $@) && mkdir -p $(dir $@) $(dir $@)/res
-	$(hide) unzip -qo -d $(dir $@) $<
-	# Make sure the extracted classes.jar has a new timestamp.
-	$(hide) touch $@
-	# Make sure the proguard and AndroidManifest.xml files exist
-	# and have a new timestamp.
-	$(hide) touch $(dir $@)/proguard.txt
-	$(hide) touch $(dir $@)/AndroidManifest.xml
-
-my_prebuilt_android_manifest := $(intermediates.COMMON)/manifest/AndroidManifest.xml
-$(eval $(call copy-one-file,$(my_src_android_manifest),$(my_prebuilt_android_manifest)))
-$(call add-dependency,$(LOCAL_BUILT_MODULE),$(my_prebuilt_android_manifest))
-
-else
-
-# run Jetifier if needed
-LOCAL_JETIFIER_INPUT_FILE := $(my_src_jar)
-include $(BUILD_SYSTEM)/jetifier.mk
-my_src_jar := $(LOCAL_JETIFIER_OUTPUT_FILE)
-
-endif
-
-$(common_classes_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-
-ifneq ($(TURBINE_ENABLED),false)
-$(common_header_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-endif
-
-$(common_classes_pre_proguard_jar) : $(my_src_jar)
-	$(transform-prebuilt-to-target)
-
-$(common_javalib_jar) : $(common_classes_jar)
-	$(transform-prebuilt-to-target)
-
-include $(BUILD_SYSTEM)/force_aapt2.mk
-
-ifdef LOCAL_AAPT2_ONLY
-LOCAL_USE_AAPT2 := true
-endif
-
-ifeq ($(LOCAL_USE_AAPT2),true)
-ifneq ($(my_src_aar),)
-
-$(intermediates.COMMON)/export_proguard_flags : $(my_src_proguard_options)
-	$(transform-prebuilt-to-target)
-
-LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
-ifeq ($(LOCAL_SDK_RES_VERSION),)
-  LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
-endif
-
-framework_res_package_export :=
-# Please refer to package.mk
-ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
-ifneq ($(filter-out current system_current test_current,$(LOCAL_SDK_RES_VERSION))$(if $(TARGET_BUILD_APPS),$(filter current system_current test_current,$(LOCAL_SDK_RES_VERSION))),)
-framework_res_package_export := \
-    $(call resolve-prebuilt-sdk-jar-path,$(LOCAL_SDK_RES_VERSION))
-else
-framework_res_package_export := \
-    $(call intermediates-dir-for,APPS,framework-res,,COMMON)/package-export.apk
-endif
-endif
-
-my_res_package := $(intermediates.COMMON)/package-res.apk
-
-# We needed only very few PRIVATE variables and aapt2.mk input variables. Reset the unnecessary ones.
-$(my_res_package): PRIVATE_AAPT2_CFLAGS :=
-$(my_res_package): PRIVATE_AAPT_FLAGS := --static-lib --no-static-lib-packages --auto-add-overlay
-$(my_res_package): PRIVATE_ANDROID_MANIFEST := $(my_src_android_manifest)
-$(my_res_package): PRIVATE_AAPT_INCLUDES := $(framework_res_package_export)
-$(my_res_package): PRIVATE_SOURCE_INTERMEDIATES_DIR :=
-$(my_res_package): PRIVATE_PROGUARD_OPTIONS_FILE :=
-$(my_res_package): PRIVATE_DEFAULT_APP_TARGET_SDK :=
-$(my_res_package): PRIVATE_DEFAULT_APP_TARGET_SDK :=
-$(my_res_package): PRIVATE_PRODUCT_AAPT_CONFIG :=
-$(my_res_package): PRIVATE_PRODUCT_AAPT_PREF_CONFIG :=
-$(my_res_package): PRIVATE_TARGET_AAPT_CHARACTERISTICS :=
-$(my_res_package) : $(framework_res_package_export)
-$(my_res_package) : $(my_src_android_manifest)
-
-full_android_manifest :=
-my_res_resources :=
-my_overlay_resources :=
-my_compiled_res_base_dir := $(intermediates.COMMON)/flat-res
-R_file_stamp :=
-proguard_options_file :=
-my_generated_res_dirs := $(intermediates.COMMON)/aar/res
-my_generated_res_dirs_deps := $(my_src_jar)
-include $(BUILD_SYSTEM)/aapt2.mk
-
-# Make sure my_res_package is created when you run mm/mmm.
-$(built_module) : $(my_res_package)
-endif  # $(my_src_aar)
-endif  # LOCAL_USE_AAPT2
-# make sure the classes.jar and javalib.jar are built before $(LOCAL_BUILT_MODULE)
-$(built_module) : $(common_javalib_jar)
-
-my_exported_sdk_libs_file := $(intermediates.COMMON)/exported-sdk-libs
-$(my_exported_sdk_libs_file): PRIVATE_EXPORTED_SDK_LIBS := $(LOCAL_EXPORT_SDK_LIBRARIES)
-$(my_exported_sdk_libs_file):
-	@echo "Export SDK libs $@"
-	$(hide) mkdir -p $(dir $@) && rm -f $@
-	$(if $(PRIVATE_EXPORTED_SDK_LIBS),\
-		$(hide) echo $(PRIVATE_EXPORTED_SDK_LIBS) | tr ' ' '\n' > $@,\
-		$(hide) touch $@)
-
-endif # ! prebuilt_module_is_dex_javalib
-endif # LOCAL_IS_HOST_MODULE is not set
-
-endif # JAVA_LIBRARIES
-
-endif # APPS
 
 $(built_module) : $(LOCAL_ADDITIONAL_DEPENDENCIES)
 
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 6923698..28d0be8 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -252,7 +252,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-      PLATFORM_SECURITY_PATCH := 2019-03-05
+      PLATFORM_SECURITY_PATCH := 2019-04-05
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH
 
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index d53995c..eee65f4 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -6,6 +6,8 @@
 
 include build/make/target/board/BoardConfigMainlineCommon.mk
 
+TARGET_NO_KERNEL := true
+
 # This flag is set by mainline but isn't desired for GSI.
 BOARD_USES_SYSTEM_OTHER_ODEX :=
 
diff --git a/target/board/BoardConfigMainlineCommon.mk b/target/board/BoardConfigMainlineCommon.mk
index acbd11d..6c56671 100644
--- a/target/board/BoardConfigMainlineCommon.mk
+++ b/target/board/BoardConfigMainlineCommon.mk
@@ -4,17 +4,13 @@
 
 # The generic product target doesn't have any hardware-specific pieces.
 TARGET_NO_BOOTLOADER := true
-TARGET_NO_KERNEL := true
 TARGET_NO_RECOVERY := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
 
 # Mainline devices must have /vendor and /product partitions.
 TARGET_COPY_OUT_VENDOR := vendor
-BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
-
 TARGET_COPY_OUT_PRODUCT := product
-BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE := ext4
 
 BOARD_VNDK_VERSION := current
 
@@ -42,7 +38,9 @@
 
 # Enable A/B update
 AB_OTA_UPDATER := true
-AB_OTA_PARTITIONS := system
 
 # Enable system property split for Treble
 BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+
+# Generate an APEX image for experiment b/119800099.
+DEXPREOPT_GENERATE_APEX_IMAGE := true
diff --git a/target/board/mainline_arm64/BoardConfig.mk b/target/board/mainline_arm64/BoardConfig.mk
index 521d976..8bb6212 100644
--- a/target/board/mainline_arm64/BoardConfig.mk
+++ b/target/board/mainline_arm64/BoardConfig.mk
@@ -25,3 +25,10 @@
 TARGET_2ND_CPU_VARIANT := generic
 
 include build/make/target/board/BoardConfigMainlineCommon.mk
+
+TARGET_NO_KERNEL := true
+
+AB_OTA_PARTITIONS := system
+
+BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
+BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index a728068..87076a9 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -329,7 +329,8 @@
 
 # Add the compatibility library that is needed when android.test.base
 # is removed from the bootclasspath.
-ifeq ($(REMOVE_ATB_FROM_BCP),true)
+# Default to excluding android.test.base from the bootclasspath.
+ifneq ($(REMOVE_ATB_FROM_BCP),false)
 PRODUCT_PACKAGES += framework-atb-backward-compatibility
 PRODUCT_BOOT_JARS += framework-atb-backward-compatibility
 else
diff --git a/tools/releasetools/build_super_image.py b/tools/releasetools/build_super_image.py
index 0150ba1..045ad55 100755
--- a/tools/releasetools/build_super_image.py
+++ b/tools/releasetools/build_super_image.py
@@ -127,7 +127,7 @@
 
       cmd += GetArgumentsForImage(partition + "_b", group + "_b", other_image)
 
-  if has_image:
+  if info_dict.get("build_non_sparse_super_partition") != "true":
     cmd.append("--sparse")
 
   cmd += ["--output", output]