diff --git a/CleanSpec.mk b/CleanSpec.mk
index 7d40872..bbb8a2f 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -646,6 +646,8 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/odm/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/vendor/odm/build.prop)
 
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/apex)
+
 # Remove libcameraservice and libcamera_client from base_system
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libcameraservice.so)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libcamera_client.so)
diff --git a/core/build_id.mk b/core/build_id.mk
index 2329288..2f9c3f3 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID=QT
+BUILD_ID=MASTER
diff --git a/target/board/mainline_arm64/BoardConfig.mk b/target/board/mainline_arm64/BoardConfig.mk
index 70505f4..ea2b3c5 100644
--- a/target/board/mainline_arm64/BoardConfig.mk
+++ b/target/board/mainline_arm64/BoardConfig.mk
@@ -34,3 +34,8 @@
 
 BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE := ext4
+
+# Mainline devices support apex
+# TODO: move this to BoardConfigMainlineCommon. Currently, GSI wants flattened
+#       apexes, but emulator wants .apex files, preventing this.
+TARGET_FLATTEN_APEX := false
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 5dbc9ec..3dabdbe 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -112,6 +112,7 @@
     iptables \
     ip-up-vpn \
     javax.obex \
+    jobscheduler-service \
     keystore \
     ld.config.txt \
     ld.mc \
diff --git a/target/product/emulator_system.mk b/target/product/emulator_system.mk
new file mode 100644
index 0000000..4b6987c
--- /dev/null
+++ b/target/product/emulator_system.mk
@@ -0,0 +1,24 @@
+#
+# 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.
+#
+# This file lists emulator experimental modules added to PRODUCT_PACKAGES,
+# only included by targets sdk_phone_x86/64 and sdk_gphone_x86/64
+
+PRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST := \
+    system/lib/libemulator_multidisplay_jni.so \
+    system/lib64/libemulator_multidisplay_jni.so \
+    system/priv-app/MultiDisplayProvider/MultiDisplayProvider.apk \
+
+PRODUCT_PACKAGES += MultiDisplayProvider
diff --git a/target/product/gsi/current.txt b/target/product/gsi/current.txt
index d71431b..e8b9507 100644
--- a/target/product/gsi/current.txt
+++ b/target/product/gsi/current.txt
@@ -23,6 +23,7 @@
 VNDK-SP: android.hardware.graphics.mapper@2.0.so
 VNDK-SP: android.hardware.graphics.mapper@2.1.so
 VNDK-SP: android.hardware.graphics.mapper@3.0.so
+VNDK-SP: android.hardware.graphics.mapper@4.0.so
 VNDK-SP: android.hardware.renderscript@1.0.so
 VNDK-SP: android.hidl.memory.token@1.0.so
 VNDK-SP: android.hidl.memory@1.0.so
@@ -74,6 +75,7 @@
 VNDK-core: android.hardware.authsecret@1.0.so
 VNDK-core: android.hardware.automotive.audiocontrol@1.0.so
 VNDK-core: android.hardware.automotive.evs@1.0.so
+VNDK-core: android.hardware.automotive.evs@1.1.so
 VNDK-core: android.hardware.automotive.vehicle@2.0.so
 VNDK-core: android.hardware.biometrics.face@1.0.so
 VNDK-core: android.hardware.biometrics.fingerprint@2.1.so
@@ -117,11 +119,13 @@
 VNDK-core: android.hardware.gnss@2.0.so
 VNDK-core: android.hardware.graphics.allocator@2.0.so
 VNDK-core: android.hardware.graphics.allocator@3.0.so
+VNDK-core: android.hardware.graphics.allocator@4.0.so
 VNDK-core: android.hardware.graphics.bufferqueue@1.0.so
 VNDK-core: android.hardware.graphics.bufferqueue@2.0.so
 VNDK-core: android.hardware.graphics.composer@2.1.so
 VNDK-core: android.hardware.graphics.composer@2.2.so
 VNDK-core: android.hardware.graphics.composer@2.3.so
+VNDK-core: android.hardware.graphics.composer@2.4.so
 VNDK-core: android.hardware.health.storage@1.0.so
 VNDK-core: android.hardware.health@1.0.so
 VNDK-core: android.hardware.health@2.0.so
@@ -190,6 +194,7 @@
 VNDK-core: android.hardware.wifi.supplicant@1.0.so
 VNDK-core: android.hardware.wifi.supplicant@1.1.so
 VNDK-core: android.hardware.wifi.supplicant@1.2.so
+VNDK-core: android.hardware.wifi.supplicant@1.3.so
 VNDK-core: android.hardware.wifi@1.0.so
 VNDK-core: android.hardware.wifi@1.1.so
 VNDK-core: android.hardware.wifi@1.2.so
diff --git a/target/product/gsi_common.mk b/target/product/gsi_common.mk
index 1b5cd55..83b41fb 100644
--- a/target/product/gsi_common.mk
+++ b/target/product/gsi_common.mk
@@ -76,7 +76,7 @@
     build/make/target/product/gsi/init.gsi.rc:system/etc/init/init.gsi.rc \
 
 # Support addtional P vendor interface
-PRODUCT_EXTRA_VNDK_VERSIONS := 28
+PRODUCT_EXTRA_VNDK_VERSIONS := 28 29
 
 # More AOSP packages
 PRODUCT_PACKAGES += \
diff --git a/target/product/media_system.mk b/target/product/media_system.mk
index 5c0902d..04cab45 100644
--- a/target/product/media_system.mk
+++ b/target/product/media_system.mk
@@ -52,6 +52,7 @@
 # The order here is the same order they end up on the classpath, so it matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
     services \
+    jobscheduler-service \
     ethernet-service \
     wifi-service \
     com.android.location.provider \
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index 5db32f2..8151d49 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -94,6 +94,6 @@
 
 # Disable iorapd by default
 PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
-    ro.iorapd.enable=false
+    ro.iorapd.enable=true
 
 PRODUCT_USES_DEFAULT_ART_CONFIG := true