diff --git a/core/Makefile b/core/Makefile
index 755b175..f10806d 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -4321,6 +4321,7 @@
 
 ifdef BOARD_PREBUILT_BOOTLOADER
 $(BUILT_TARGET_FILES_PACKAGE): $(INSTALLED_BOOTLOADER_MODULE)
+droidcore: $(INSTALLED_BOOTLOADER_MODULE)
 endif
 
 # Depending on the various images guarantees that the underlying
@@ -4418,7 +4419,7 @@
 ifdef BOARD_KERNEL_PAGESIZE
 	echo "$(BOARD_KERNEL_PAGESIZE)" > $(zip_root)/$(PRIVATE_RECOVERY_OUT)/pagesize
 endif
-endif # INSTALLED_VENDOR_BOOTIMAGE_TARGET not defined
+endif # not (BUILDING_VENDOR_BOOT_IMAGE and AB_OTA_UPDATER)
 endif # INSTALLED_RECOVERYIMAGE_TARGET defined or BOARD_USES_RECOVERY_AS_BOOT is true
 	@# Components of the boot image
 	$(hide) mkdir -p $(zip_root)/BOOT
@@ -4608,9 +4609,13 @@
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_ODMIMAGE_TARGET) $(zip_root)/IMAGES/
 endif
-ifdef BOARD_PREBUILT_VENDOR_DLKIMMAGE
+ifdef BOARD_PREBUILT_VENDOR_DLKMIMAGE
 	$(hide) mkdir -p $(zip_root)/IMAGES
-	$(hide) cp $(INSTALLED_VENDOR_DLKIMMAGE_TARGET) $(zip_root)/IMAGES/
+	$(hide) cp $(INSTALLED_VENDOR_DLKMIMAGE_TARGET) $(zip_root)/IMAGES/
+endif
+ifdef BOARD_PREBUILT_ODM_DLKMIMAGE
+	$(hide) mkdir -p $(zip_root)/IMAGES
+	$(hide) cp $(INSTALLED_ODM_DLKMIMAGE_TARGET) $(zip_root)/IMAGES/
 endif
 ifdef BOARD_PREBUILT_DTBOIMAGE
 	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 0ee4e12..cb6cadc 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -516,7 +516,11 @@
 $(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
 $(LOCAL_INSTALLED_MODULE): $(LOCAL_BUILT_MODULE)
 	@echo "Install: $@"
+ifeq ($(LOCAL_MODULE_MAKEFILE),$(SOONG_ANDROID_MK))
+	$(copy-file-or-link-to-new-target)
+else
 	$(copy-file-to-new-target)
+endif
 	$(PRIVATE_POST_INSTALL_CMD)
 endif
 
diff --git a/core/definitions.mk b/core/definitions.mk
index 2cf7a04..ace3ff8 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2554,6 +2554,18 @@
 $(hide) cp $< $@
 endef
 
+# The same as copy-file-to-new-target, but preserve symlinks. Symlinks are
+# converted to absolute to not break.
+define copy-file-or-link-to-new-target
+@mkdir -p $(dir $@)
+$(hide) rm -f $@
+$(hide) if [ -h $< ]; then \
+  ln -s $$(realpath $<) $@; \
+else \
+  cp $< $@; \
+fi
+endef
+
 # Copy a prebuilt file to a target location.
 define transform-prebuilt-to-target
 @echo "$($(PRIVATE_PREFIX)DISPLAY) Prebuilt: $(PRIVATE_MODULE) ($@)"
@@ -2566,6 +2578,13 @@
 $(copy-file-to-target-strip-comments)
 endef
 
+# Copy a prebuilt file to a target location, but preserve symlinks rather than
+# dereference them.
+define copy-or-link-prebuilt-to-target
+@echo "$($(PRIVATE_PREFIX)DISPLAY) Prebuilt: $(PRIVATE_MODULE) ($@)"
+$(copy-file-or-link-to-new-target)
+endef
+
 # Copy a list of files/directories to target location, with sub dir structure preserved.
 # For example $(HOST_OUT_EXECUTABLES)/aapt -> $(staging)/bin/aapt .
 # $(1): the source list of files/directories.
diff --git a/core/soong_cc_prebuilt.mk b/core/soong_cc_prebuilt.mk
index c9b742a..a0315a5 100644
--- a/core/soong_cc_prebuilt.mk
+++ b/core/soong_cc_prebuilt.mk
@@ -142,8 +142,16 @@
   $(LOCAL_BUILT_MODULE): $(same_vndk_variants_stamp)
 endif
 
+# Use copy-or-link-prebuilt-to-target for host executables and shared libraries,
+# to preserve symlinks to the source trees. They can then run directly from the
+# prebuilt directories where the linker can load their dependencies using
+# relative RUNPATHs.
 $(LOCAL_BUILT_MODULE): $(LOCAL_PREBUILT_MODULE_FILE)
+ifeq ($(LOCAL_IS_HOST_MODULE) $(if $(filter EXECUTABLES SHARED_LIBRARIES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),true,),true true)
+	$(copy-or-link-prebuilt-to-target)
+else
 	$(transform-prebuilt-to-target)
+endif
 ifneq ($(filter EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
 	$(hide) chmod +x $@
 endif
diff --git a/core/soong_rust_prebuilt.mk b/core/soong_rust_prebuilt.mk
index 804e37e..de6bafd 100644
--- a/core/soong_rust_prebuilt.mk
+++ b/core/soong_rust_prebuilt.mk
@@ -57,7 +57,11 @@
 endif
 
 $(LOCAL_BUILT_MODULE): $(LOCAL_PREBUILT_MODULE_FILE)
+ifeq ($(LOCAL_IS_HOST_MODULE) $(if $(filter EXECUTABLES SHARED_LIBRARIES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),true,),true true)
+	$(copy-or-link-prebuilt-to-target)
+else
 	$(transform-prebuilt-to-target)
+endif
 ifneq ($(filter EXECUTABLES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
 	$(hide) chmod +x $@
 endif
diff --git a/core/tasks/platform_availability_check.mk b/core/tasks/platform_availability_check.mk
index 043d130..f252ff5 100644
--- a/core/tasks/platform_availability_check.mk
+++ b/core/tasks/platform_availability_check.mk
@@ -26,11 +26,31 @@
       $(if $(filter true,$(ALL_MODULES.$(m).NOT_AVAILABLE_FOR_PLATFORM)),\
         $(m))))))
 
-_violators_with_path := $(foreach m,$(sort $(_modules_not_available_for_platform)),\
+ifndef ALLOW_MISSING_DEPENDENCIES
+  _violators_with_path := $(foreach m,$(sort $(_modules_not_available_for_platform)),\
     $(m):$(word 1,$(ALL_MODULES.$(m).PATH))\
-)
+  )
 
-$(call maybe-print-list-and-error,$(_violators_with_path),\
+  $(call maybe-print-list-and-error,$(_violators_with_path),\
 Following modules are requested to be installed. But are not available \
 for platform because they do not have "//apex_available:platform" or \
 they depend on other modules that are not available for platform)
+
+else
+
+# Don't error out immediately when ALLOW_MISSING_DEPENDENCIES is set.
+# Instead, add a dependency on a rule that prints the error message.
+  define not_available_for_platform_rule
+    not_installable_file := $(patsubst $(OUT_DIR)/%,$(OUT_DIR)/NOT_AVAILABLE_FOR_PLATFORM/%,$(1)))
+    $(1): $$(not_installable_file)
+    $$(not_installable_file):
+	$(call echo-error,$(2),Module is requested to be installed but is not \
+available for platform because it does not have "//apex_available:platform" or \
+it depends on other modules that are not available for platform.)
+	exit 1
+  endef
+
+  $(foreach m,$(_modules_not_available_for_platform),\
+    $(foreach i,$(ALL_MODULES.$(m).INSTALLED),\
+      $(eval $(call not_available_for_platform_rule,$(i),$(m)))))
+endif
diff --git a/rbesetup.sh b/rbesetup.sh
index adcf081..724ad7d 100644
--- a/rbesetup.sh
+++ b/rbesetup.sh
@@ -36,6 +36,7 @@
 # This function sets RBE specific environment variables needed for the build to
 # executed by RBE. This file should be sourced once per checkout of Android code.
 function _set_rbe_vars() {
+  unset USE_GOMA
   export USE_RBE="true"
   export RBE_CXX_EXEC_STRATEGY="remote_local_fallback"
   export RBE_JAVAC=1
diff --git a/tools/releasetools/ota_metadata.proto b/tools/releasetools/ota_metadata.proto
index 4d87619..ff6114d 100644
--- a/tools/releasetools/ota_metadata.proto
+++ b/tools/releasetools/ota_metadata.proto
@@ -64,8 +64,10 @@
 // and prerequisite to install the update correctly.
 message OtaMetadata {
   enum OtaType {
-    AB = 0;
-    BLOCK = 1;
+    UNKNOWN = 0;
+    AB = 1;
+    BLOCK = 2;
+    BRICK = 3;
   };
   OtaType type = 1;
   // True if we need to wipe after the update.