diff --git a/ci/build_test_suites.py b/ci/build_test_suites.py
index 3b8d530..443e872 100644
--- a/ci/build_test_suites.py
+++ b/ci/build_test_suites.py
@@ -74,6 +74,12 @@
     if 'optimized_build' not in self.build_context.enabled_build_features:
       return BuildPlan(set(self.args.extra_targets), set())
 
+    if not self.build_context.test_infos:
+      logging.warning('Build context has no test infos, skipping optimizations.')
+      for target in self.args.extra_targets:
+        get_metrics_agent().report_unoptimized_target(target, 'BUILD_CONTEXT has no test infos.')
+      return BuildPlan(set(self.args.extra_targets), set())
+
     build_targets = set()
     packaging_commands_getters = []
     # In order to roll optimizations out differently between test suites and
diff --git a/ci/build_test_suites_test.py b/ci/build_test_suites_test.py
index 29d268e..190740f 100644
--- a/ci/build_test_suites_test.py
+++ b/ci/build_test_suites_test.py
@@ -306,7 +306,8 @@
     build_planner = self.create_build_planner(
         build_targets=build_targets,
         build_context=self.create_build_context(
-            enabled_build_features=[{'name': self.get_target_flag('target_1')}]
+            enabled_build_features=[{'name': self.get_target_flag('target_1')}],
+            test_context=self.get_test_context('target_1'),
         ),
     )
 
@@ -322,7 +323,8 @@
     build_planner = self.create_build_planner(
         build_targets=build_targets,
         build_context=self.create_build_context(
-            enabled_build_features=[{'name': self.get_target_flag('target_1')}]
+            enabled_build_features=[{'name': self.get_target_flag('target_1')}],
+            test_context=self.get_test_context('target_1'),
         ),
         packaging_commands=packaging_commands,
     )
diff --git a/core/Makefile b/core/Makefile
index e106dad..1180073 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -6663,7 +6663,7 @@
 	@# Contents of the system image
 ifneq ($(SOONG_DEFINED_SYSTEM_IMAGE_PATH),)
 	$(hide) $(call package_files-copy-root, \
-	    $(SOONG_DEFINED_SYSTEM_IMAGE_BASE)/root/system,$(zip_root)/SYSTEM)
+	    $(SOONG_DEFINED_SYSTEM_IMAGE_BASE)/system/system,$(zip_root)/SYSTEM)
 else
 	$(hide) $(call package_files-copy-root, \
 	    $(SYSTEMIMAGE_SOURCE_DIR),$(zip_root)/SYSTEM)
diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index 8e70570..6040ad3 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -202,6 +202,9 @@
 $(call soong_config_set,ANDROID,release_package_profiling_module,$(RELEASE_PACKAGE_PROFILING_MODULE))
 $(call soong_config_set,bootclasspath,release_package_profiling_module,$(RELEASE_PACKAGE_PROFILING_MODULE))
 
+# Move VCN from platform to the Tethering module; used by both platform and module
+$(call soong_config_set,ANDROID,is_vcn_in_mainline,$(RELEASE_MOVE_VCN_TO_MAINLINE))
+
 # Add perf-setup build flag to soong
 # Note: BOARD_PERFSETUP_SCRIPT location must be under platform_testing/scripts/perf-setup/.
 ifdef BOARD_PERFSETUP_SCRIPT
diff --git a/core/main.mk b/core/main.mk
index 624df49..4b76971 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -277,10 +277,7 @@
 # Include all of the makefiles in the system
 #
 
-subdir_makefiles := \
-    $(SOONG_OUT_DIR)/installs-$(TARGET_PRODUCT)$(COVERAGE_SUFFIX).mk \
-    $(SOONG_ANDROID_MK) \
-    build/make/target/board/android-info.mk
+subdir_makefiles := $(SOONG_OUT_DIR)/installs-$(TARGET_PRODUCT)$(COVERAGE_SUFFIX).mk $(SOONG_ANDROID_MK)
 
 # Android.mk files are only used on Linux builds, Mac only supports Android.bp
 ifeq ($(HOST_OS),linux)
diff --git a/core/release_config.mk b/core/release_config.mk
index fe2170e..68e115f 100644
--- a/core/release_config.mk
+++ b/core/release_config.mk
@@ -146,6 +146,9 @@
         # This will also set ALL_RELEASE_CONFIGS_FOR_PRODUCT and _used_files for us.
         $(eval include $(_flags_file))
         $(KATI_extra_file_deps $(OUT_DIR)/release-config $(protobuf_map_files) $(_flags_file))
+        ifneq (,$(_disallow_lunch_use))
+            $(error Release config ${TARGET_RELEASE} is disallowed for build.  Please use one of: $(ALL_RELEASE_CONFIGS_FOR_PRODUCT))
+        endif
     else
         # This is the first pass of product config.
         $(eval include $(_flags_varmk))
diff --git a/core/soong_config.mk b/core/soong_config.mk
index a007888..4485072 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -525,6 +525,22 @@
   # Used to generate recovery partition
   $(call add_json_str, TargetScreenDensity, $(TARGET_SCREEN_DENSITY))
 
+  # Used to generate /recovery/root/build.prop
+  $(call add_json_map, PrivateRecoveryUiProperties)
+    $(call add_json_str, animation_fps, $(TARGET_RECOVERY_UI_ANIMATION_FPS))
+    $(call add_json_str, margin_height, $(TARGET_RECOVERY_UI_MARGIN_HEIGHT))
+    $(call add_json_str, margin_width, $(TARGET_RECOVERY_UI_MARGIN_WIDTH))
+    $(call add_json_str, menu_unusable_rows, $(TARGET_RECOVERY_UI_MENU_UNUSABLE_ROWS))
+    $(call add_json_str, progress_bar_baseline, $(TARGET_RECOVERY_UI_PROGRESS_BAR_BASELINE))
+    $(call add_json_str, touch_low_threshold, $(TARGET_RECOVERY_UI_TOUCH_LOW_THRESHOLD))
+    $(call add_json_str, touch_high_threshold, $(TARGET_RECOVERY_UI_TOUCH_HIGH_THRESHOLD))
+    $(call add_json_str, vr_stereo_offset, $(TARGET_RECOVERY_UI_VR_STEREO_OFFSET))
+    $(call add_json_str, brightness_file, $(TARGET_RECOVERY_UI_BRIGHTNESS_FILE))
+    $(call add_json_str, max_brightness_file, $(TARGET_RECOVERY_UI_MAX_BRIGHTNESS_FILE))
+    $(call add_json_str, brightness_normal_percent, $(TARGET_RECOVERY_UI_BRIGHTNESS_NORMAL))
+    $(call add_json_str, brightness_dimmed_percent, $(TARGET_RECOVERY_UI_BRIGHTNESS_DIMMED))
+  $(call end_json_map)
+
 $(call end_json_map)
 
 # For converting vintf_data
diff --git a/target/board/android-info.mk b/target/board/Android.mk
similarity index 100%
rename from target/board/android-info.mk
rename to target/board/Android.mk
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index b9b226b..2907e07 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -96,7 +96,6 @@
     enhanced-confirmation.xml \
     ExtShared \
     flags_health_check \
-    framework-connectivity-b \
     framework-graphics \
     framework-location \
     framework-minus-apex \
@@ -348,6 +347,13 @@
         com.android.webview.bootstrap
 endif
 
+# Only add the jar when it is not in the Tethering module. Otherwise,
+# it will be added via com.android.tethering
+ifneq ($(RELEASE_MOVE_VCN_TO_MAINLINE),true)
+    PRODUCT_PACKAGES += \
+        framework-connectivity-b
+endif
+
 ifneq (,$(RELEASE_RANGING_STACK))
     PRODUCT_PACKAGES += \
         com.android.ranging
diff --git a/target/product/default_art_config.mk b/target/product/default_art_config.mk
index 83d9215..d857e04 100644
--- a/target/product/default_art_config.mk
+++ b/target/product/default_art_config.mk
@@ -51,7 +51,6 @@
     framework-minus-apex \
     framework-graphics \
     framework-location \
-    framework-connectivity-b \
     ext \
     telephony-common \
     voip-common \
@@ -121,6 +120,17 @@
     $(call soong_config_set,bootclasspath,release_ranging_stack,true)
 endif
 
+# Check if VCN should be built into the tethering module or not
+ifeq ($(RELEASE_MOVE_VCN_TO_MAINLINE),true)
+    PRODUCT_APEX_BOOT_JARS += \
+        com.android.tethering:framework-connectivity-b \
+
+else
+    PRODUCT_BOOT_JARS += \
+        framework-connectivity-b \
+
+endif
+
 # List of system_server classpath jars delivered via apex.
 # Keep the list sorted by module names and then library names.
 # Note: For modules available in Q, DO NOT add new entries here.
diff --git a/target/product/generic/Android.bp b/target/product/generic/Android.bp
index 4a3d21b..66bf694 100644
--- a/target/product/generic/Android.bp
+++ b/target/product/generic/Android.bp
@@ -705,7 +705,6 @@
                 "framework-graphics", // base_system
                 "framework-location", // base_system
                 "framework-minus-apex-install-dependencies", // base_system
-                "framework-connectivity-b", // base_system
                 "framework_compatibility_matrix.device.xml",
                 "generic_system_fonts", // ok
                 "hwservicemanager_compat_symlink_module", // base_system
@@ -734,6 +733,11 @@
                     "com.android.profiling", // base_system (RELEASE_PACKAGE_PROFILING_MODULE)
                 ],
                 default: [],
+            }) + select(release_flag("RELEASE_MOVE_VCN_TO_MAINLINE"), {
+                true: [],
+                default: [
+                    "framework-connectivity-b", // base_system
+                ],
             }) + select(release_flag("RELEASE_AVATAR_PICKER_APP"), {
                 true: [
                     "AvatarPicker", // generic_system (RELEASE_AVATAR_PICKER_APP)