diff --git a/api/Android.bp b/api/Android.bp
index 3c92cb2..7ef00b0 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -73,6 +73,7 @@
         "framework-bluetooth",
         "framework-configinfrastructure",
         "framework-connectivity",
+        "framework-connectivity-b",
         "framework-connectivity-t",
         "framework-devicelock",
         "framework-graphics",
diff --git a/core/java/android/hardware/location/OWNERS b/core/java/android/hardware/location/OWNERS
index 747f909..340d6f2 100644
--- a/core/java/android/hardware/location/OWNERS
+++ b/core/java/android/hardware/location/OWNERS
@@ -9,4 +9,4 @@
 yuhany@google.com
 
 # ContextHub team
-per-file *ContextHub*,*NanoApp* = file:platform/system/chre:/OWNERS
+per-file Android.bp,*Hub*,*NanoApp* = file:platform/system/chre:/OWNERS
diff --git a/core/java/android/util/Log.java b/core/java/android/util/Log.java
index 8358b9a..1dd9d46 100644
--- a/core/java/android/util/Log.java
+++ b/core/java/android/util/Log.java
@@ -75,8 +75,7 @@
 @android.ravenwood.annotation.RavenwoodClassLoadHook(
         "com.android.platform.test.ravenwood.runtimehelper.ClassLoadHook.onClassLoaded")
 // Uncomment the following annotation to switch to the Java substitution version.
-//@android.ravenwood.annotation.RavenwoodNativeSubstitutionClass(
-//        "com.android.platform.test.ravenwood.nativesubstitution.Log_host")
+@android.ravenwood.annotation.RavenwoodRedirectionClass("Log_host")
 public final class Log {
     /** @hide */
     @IntDef({ASSERT, ERROR, WARN, INFO, DEBUG, VERBOSE})
@@ -250,6 +249,7 @@
      *         tag limit of concern after this API level.
      */
     @FastNative
+    @android.ravenwood.annotation.RavenwoodRedirect
     public static native boolean isLoggable(@Nullable String tag, @Level int level);
 
     /**
@@ -425,6 +425,7 @@
      * @hide
      */
     @UnsupportedAppUsage
+    @android.ravenwood.annotation.RavenwoodRedirect
     public static native int println_native(int bufID, int priority, String tag, String msg);
 
     /**
@@ -452,6 +453,7 @@
      * Return the maximum payload the log daemon accepts without truncation.
      * @return LOGGER_ENTRY_MAX_PAYLOAD.
      */
+    @android.ravenwood.annotation.RavenwoodRedirect
     private static native int logger_entry_max_payload_native();
 
     /**
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/accessibility/OWNERS b/packages/SystemUI/multivalentTests/src/com/android/systemui/accessibility/OWNERS
new file mode 100644
index 0000000..a2001e6
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/accessibility/OWNERS
@@ -0,0 +1 @@
+include /core/java/android/view/accessibility/OWNERS
\ No newline at end of file
diff --git a/packages/Vcn/framework-b/Android.bp b/packages/Vcn/framework-b/Android.bp
new file mode 100644
index 0000000..be64bb1
--- /dev/null
+++ b/packages/Vcn/framework-b/Android.bp
@@ -0,0 +1,44 @@
+//
+// Copyright (C) 2024 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.
+//
+
+package {
+    default_team: "trendy_team_enigma",
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_defaults {
+    name: "framework-connectivity-b-defaults",
+    sdk_version: "module_current",
+    min_sdk_version: "35", // TODO: Make it Android 25Q2 when this is included in mainline
+    defaults: ["framework-module-defaults"], // This is a boot jar
+
+    srcs: [
+        "src/**/*.java",
+    ],
+}
+
+java_sdk_library {
+    name: "framework-connectivity-b",
+    defaults: [
+        "framework-connectivity-b-defaults",
+    ],
+
+    permitted_packages: [
+        "android.net.vcn",
+    ],
+
+    // TODO: b/375213246 Expose this library to Tethering module
+}
diff --git a/packages/Vcn/framework-b/api/current.txt b/packages/Vcn/framework-b/api/current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/api/module-lib-current.txt b/packages/Vcn/framework-b/api/module-lib-current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/module-lib-current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/api/module-lib-removed.txt b/packages/Vcn/framework-b/api/module-lib-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/module-lib-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/api/removed.txt b/packages/Vcn/framework-b/api/removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/api/system-current.txt b/packages/Vcn/framework-b/api/system-current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/system-current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/api/system-removed.txt b/packages/Vcn/framework-b/api/system-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/packages/Vcn/framework-b/api/system-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/packages/Vcn/framework-b/src/android/net/vcn/Placeholder.java b/packages/Vcn/framework-b/src/android/net/vcn/Placeholder.java
new file mode 100644
index 0000000..fb5e153
--- /dev/null
+++ b/packages/Vcn/framework-b/src/android/net/vcn/Placeholder.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+package android.net.vcn;
+
+/**
+ * Placeholder class so new framework-vcn isn't empty
+ *
+ * @hide
+ */
+// This class will be removed once source code is migrated
+public class Placeholder {}
diff --git a/packages/Vcn/service-b/Android.bp b/packages/Vcn/service-b/Android.bp
new file mode 100644
index 0000000..a462297
--- /dev/null
+++ b/packages/Vcn/service-b/Android.bp
@@ -0,0 +1,36 @@
+//
+// Copyright (C) 2024 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.
+//
+
+package {
+    default_team: "trendy_team_enigma",
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_library {
+    name: "service-connectivity-b-pre-jarjar",
+    sdk_version: "system_server_current",
+    min_sdk_version: "35", // TODO: Make it Android 25Q2 when this is included in mainline
+    defaults: ["framework-system-server-module-defaults"], // This is a system server jar
+
+    srcs: [
+        "src/**/*.java",
+    ],
+
+    // TODO: b/375213246 Expose this library to Tethering module
+    visibility: [
+        "//frameworks/base/services",
+    ],
+}
diff --git a/packages/Vcn/service-b/src/com/android/server/vcn/Placeholder.java b/packages/Vcn/service-b/src/com/android/server/vcn/Placeholder.java
new file mode 100644
index 0000000..e799145
--- /dev/null
+++ b/packages/Vcn/service-b/src/com/android/server/vcn/Placeholder.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+package com.android.server.vcn;
+
+/**
+ * Placeholder class so new service-vcn isn't empty
+ *
+ * @hide
+ */
+// This class will be removed once source code is migrated
+public class Placeholder {}
diff --git a/ravenwood/Android.bp b/ravenwood/Android.bp
index b3f78ab..4731cfb 100644
--- a/ravenwood/Android.bp
+++ b/ravenwood/Android.bp
@@ -279,6 +279,15 @@
     shared_libs: [
         "liblog",
     ],
+    visibility: ["//visibility:private"],
+}
+
+cc_library_host_shared {
+    name: "libravenwood_initializer",
+    defaults: ["ravenwood_jni_defaults"],
+    srcs: [
+        "runtime-jni/ravenwood_initializer.cpp",
+    ],
 }
 
 // We need this as a separate library because we need to overload the
@@ -301,7 +310,6 @@
         "libutils",
         "libcutils",
     ],
-    visibility: ["//frameworks/base"],
 }
 
 // For collecting the *stats.csv files in a known directory under out/host/linux-x86/testcases/.
@@ -659,6 +667,7 @@
     ],
     jni_libs: [
         // Libraries has to be loaded in the following order
+        "libravenwood_initializer",
         "libravenwood_sysprop",
         "libravenwood_runtime",
         "libandroid_runtime",
diff --git a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodNativeLoader.java b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodNativeLoader.java
index d29b93c..a208d6d 100644
--- a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodNativeLoader.java
+++ b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodNativeLoader.java
@@ -40,7 +40,7 @@
      * See frameworks/base/core/jni/platform/host/HostRuntime.cpp
      */
     private static final Class<?>[] sLibandroidClasses = {
-            android.util.Log.class,
+//            android.util.Log.class, // Not using native log: b/377377826
             android.os.Parcel.class,
             android.os.Binder.class,
             android.os.SystemProperties.class,
diff --git a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
index 28c262d..9177857 100644
--- a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
+++ b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
@@ -51,6 +51,7 @@
 import androidx.test.platform.app.InstrumentationRegistry;
 
 import com.android.hoststubgen.hosthelper.HostTestUtils;
+import com.android.internal.annotations.GuardedBy;
 import com.android.internal.os.RuntimeInit;
 import com.android.ravenwood.RavenwoodRuntimeNative;
 import com.android.ravenwood.RavenwoodRuntimeState;
@@ -86,6 +87,7 @@
     }
 
     private static final String MAIN_THREAD_NAME = "RavenwoodMain";
+    private static final String LIBRAVENWOOD_INITIALIZER_NAME = "ravenwood_initializer";
     private static final String RAVENWOOD_NATIVE_SYSPROP_NAME = "ravenwood_sysprop";
     private static final String RAVENWOOD_NATIVE_RUNTIME_NAME = "ravenwood_runtime";
     private static final String RAVENWOOD_BUILD_PROP =
@@ -139,23 +141,61 @@
         return res;
     }
 
+    private static final Object sInitializationLock = new Object();
+
+    @GuardedBy("sInitializationLock")
+    private static boolean sInitialized = false;
+
+    @GuardedBy("sInitializationLock")
+    private static Throwable sExceptionFromGlobalInit;
+
     private static RavenwoodAwareTestRunner sRunner;
     private static RavenwoodSystemProperties sProps;
-    private static boolean sInitialized = false;
 
     /**
      * Initialize the global environment.
      */
     public static void globalInitOnce() {
-        if (sInitialized) {
-            return;
+        synchronized (sInitializationLock) {
+            if (!sInitialized) {
+                // globalInitOnce() is called from class initializer, which cause
+                // this method to be called recursively,
+                sInitialized = true;
+
+                // This is the first call.
+                try {
+                    globalInitInner();
+                } catch (Throwable th) {
+                    Log.e(TAG, "globalInit() failed", th);
+
+                    sExceptionFromGlobalInit = th;
+                    throw th;
+                }
+            } else {
+                // Subsequent calls. If the first call threw, just throw the same error, to prevent
+                // the test from running.
+                if (sExceptionFromGlobalInit != null) {
+                    Log.e(TAG, "globalInit() failed re-throwing the same exception",
+                            sExceptionFromGlobalInit);
+
+                    SneakyThrow.sneakyThrow(sExceptionFromGlobalInit);
+                }
+            }
         }
-        sInitialized = true;
+    }
+
+    private static void globalInitInner() {
+        if (RAVENWOOD_VERBOSE_LOGGING) {
+            Log.v(TAG, "globalInit() called here...", new RuntimeException("NOT A CRASH"));
+        }
+
+        // Some process-wide initialization. (maybe redirect stdout/stderr)
+        RavenwoodCommonUtils.loadJniLibrary(LIBRAVENWOOD_INITIALIZER_NAME);
 
         // We haven't initialized liblog yet, so directly write to System.out here.
-        RavenwoodCommonUtils.log(TAG, "globalInit()");
+        RavenwoodCommonUtils.log(TAG, "globalInitInner()");
 
-        // Load libravenwood_sysprop first
+        // Load libravenwood_sysprop before other libraries that may use SystemProperties.
         var libProp = RavenwoodCommonUtils.getJniLibraryPath(RAVENWOOD_NATIVE_SYSPROP_NAME);
         System.load(libProp);
         RavenwoodRuntimeNative.reloadNativeLibrary(libProp);
diff --git a/ravenwood/runtime-jni/ravenwood_initializer.cpp b/ravenwood/runtime-jni/ravenwood_initializer.cpp
new file mode 100644
index 0000000..89fb7c3
--- /dev/null
+++ b/ravenwood/runtime-jni/ravenwood_initializer.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2024 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 is compiled into a single SO file, which we load at the very first.
+  * We can do process-wide initialization here.
+  */
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "jni_helper.h"
+
+static void maybeRedirectLog() {
+    auto ravenwoodLogOut = getenv("RAVENWOOD_LOG_OUT");
+    if (ravenwoodLogOut == NULL) {
+        return;
+    }
+    ALOGI("RAVENWOOD_LOG_OUT set. Redirecting output to %s", ravenwoodLogOut);
+
+    // Redirect stdin / stdout to /dev/tty.
+    int ttyFd = open(ravenwoodLogOut, O_WRONLY | O_APPEND);
+    if (ttyFd == -1) {
+        ALOGW("$RAVENWOOD_LOG_OUT is set to %s, but failed to open: %s ", ravenwoodLogOut,
+                strerror(errno));
+        return;
+    }
+    dup2(ttyFd, 1);
+    dup2(ttyFd, 2);
+}
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void* /* reserved */) {
+    ALOGI("%s: JNI_OnLoad", __FILE__);
+
+    maybeRedirectLog();
+    return JNI_VERSION_1_4;
+}
diff --git a/ravenwood/runtime-jni/ravenwood_runtime.cpp b/ravenwood/runtime-jni/ravenwood_runtime.cpp
index 5b75e98..c1993f6 100644
--- a/ravenwood/runtime-jni/ravenwood_runtime.cpp
+++ b/ravenwood/runtime-jni/ravenwood_runtime.cpp
@@ -180,24 +180,6 @@
     return syscall(__NR_gettid);
 }
 
-static void maybeRedirectLog() {
-    auto ravenwoodLogOut = getenv("RAVENWOOD_LOG_OUT");
-    if (ravenwoodLogOut == NULL) {
-        return;
-    }
-    ALOGI("RAVENWOOD_LOG_OUT set. Redirecting output to %s", ravenwoodLogOut);
-
-    // Redirect stdin / stdout to /dev/tty.
-    int ttyFd = open(ravenwoodLogOut, O_WRONLY);
-    if (ttyFd == -1) {
-        ALOGW("$RAVENWOOD_LOG_OUT is set to %s, but failed to open: %s ", ravenwoodLogOut,
-                strerror(errno));
-        return;
-    }
-    dup2(ttyFd, 1);
-    dup2(ttyFd, 2);
-}
-
 // ---- Registration ----
 
 extern void register_android_system_OsConstants(JNIEnv* env);
@@ -218,8 +200,6 @@
 };
 
 extern "C" jint JNI_OnLoad(JavaVM* vm, void* /* reserved */) {
-    maybeRedirectLog();
-
     ALOGI("%s: JNI_OnLoad", __FILE__);
 
     JNIEnv* env = GetJNIEnvOrDie(vm);
diff --git a/services/Android.bp b/services/Android.bp
index e8d6630..d99ed3d 100644
--- a/services/Android.bp
+++ b/services/Android.bp
@@ -242,6 +242,7 @@
         "services.wifi",
         "service-blobstore",
         "service-jobscheduler",
+        "service-connectivity-b-pre-jarjar", // Move it to mainline module
         "android.hidl.base-V1.0-java",
     ],
 
diff --git a/services/autofill/java/com/android/server/autofill/ui/AutoFillUI.java b/services/autofill/java/com/android/server/autofill/ui/AutoFillUI.java
index 2e9a4dc..a10039f 100644
--- a/services/autofill/java/com/android/server/autofill/ui/AutoFillUI.java
+++ b/services/autofill/java/com/android/server/autofill/ui/AutoFillUI.java
@@ -462,7 +462,9 @@
 
                         @Override
                         public void onShown() {
-                            mCallback.onShown(UI_TYPE_DIALOG, response.getDatasets().size());
+                            if (mCallback != null) {
+                                mCallback.onShown(UI_TYPE_DIALOG, response.getDatasets().size());
+                            }
                         }
 
                         @Override
@@ -511,7 +513,9 @@
 
                         @Override
                         public void startIntentSender(IntentSender intentSender) {
-                            mCallback.startIntentSenderAndFinishSession(intentSender);
+                            if (mCallback != null) {
+                                mCallback.startIntentSenderAndFinishSession(intentSender);
+                            }
                         }
 
                         private void log(int type) {
diff --git a/services/core/java/com/android/server/am/OWNERS b/services/core/java/com/android/server/am/OWNERS
index 2a30ad0..6f99673 100644
--- a/services/core/java/com/android/server/am/OWNERS
+++ b/services/core/java/com/android/server/am/OWNERS
@@ -61,6 +61,9 @@
 per-file SettingsToPropertiesMapper.java = omakoto@google.com, yamasani@google.com, dzshen@google.com, zhidou@google.com, tedbauer@google.com
 per-file CarUserSwitchingDialog.java = file:platform/packages/services/Car:/OWNERS
 
+# Activity Security
+per-file ActivityManager* = file:/ACTIVITY_SECURITY_OWNERS
+
 # Londoners
 michaelwr@google.com #{LAST_RESORT_SUGGESTION}
 narayan@google.com #{LAST_RESORT_SUGGESTION}
diff --git a/services/core/java/com/android/server/wm/OWNERS b/services/core/java/com/android/server/wm/OWNERS
index 4310231..63cd59e 100644
--- a/services/core/java/com/android/server/wm/OWNERS
+++ b/services/core/java/com/android/server/wm/OWNERS
@@ -34,4 +34,5 @@
 
 # Files related to activity security
 per-file ActivityStarter.java = file:/ACTIVITY_SECURITY_OWNERS
+per-file ActivityStartController.java = file:/ACTIVITY_SECURITY_OWNERS
 per-file ActivityTaskManagerService.java = file:/ACTIVITY_SECURITY_OWNERS