[MS27] Expose noteUntaggedSocket SystemApi

While Data usage related codes are moving to mainline module,
StrictMode#vmUntaggedSocketEnabled() and onUntaggedSocket()
can no longer be accessed from NetworkManagementSocketTagger.

Thus, expose alternative SystemApi to allow invocations from
the module.

Test: TH
Bug: 204830222
Exempt-From-Owner-Approval: 1. Owner approved the change with
  explicitly granted submission after adderessing the
  straight-forward comment. 2. Owner is OOO for 3 months.
Change-Id: Ib54ff54ce3617ae0d04080a1740e78b086bbb039

core/api/module-lib-current.txt

@@ -321,6 +321,10 @@ package android.os {
     method @Nullable public android.os.IBinder getOrThrow() throws android.os.StatsServiceManager.ServiceNotFoundException;
   }
 
+  public final class StrictMode {
+    method public static void noteUntaggedSocket();
+  }
+
   public class SystemConfigManager {
     method @NonNull public java.util.List<android.content.ComponentName> getEnabledComponentOverrides(@NonNull String);
   }

core/java/android/os/StrictMode.java

@@ -15,10 +15,13 @@
  */
 package android.os;
 
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+
 import android.animation.ValueAnimator;
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
@@ -2694,6 +2697,12 @@ public final class StrictMode {
         ((AndroidBlockGuardPolicy) policy).onCustomSlowCall(name);
     }
 
+    /** @hide */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static void noteUntaggedSocket() {
+        if (vmUntaggedSocketEnabled()) onUntaggedSocket();
+    }
+
     /**
      * For code to note that a resource was obtained using a type other than its defined type. This
      * is a no-op unless the current thread's {@link android.os.StrictMode.ThreadPolicy} has {@link

core/java/com/android/server/NetworkManagementSocketTagger.java

@@ -70,8 +70,8 @@ public final class NetworkManagementSocketTagger extends SocketTagger {
             Log.d(TAG, "tagSocket(" + fd.getInt$() + ") with statsTag=0x"
                     + Integer.toHexString(options.statsTag) + ", statsUid=" + options.statsUid);
         }
-        if (options.statsTag == -1 && StrictMode.vmUntaggedSocketEnabled()) {
-            StrictMode.onUntaggedSocket();
+        if (options.statsTag == -1) {
+            StrictMode.noteUntaggedSocket();
         }
         // TODO: skip tagging when options would be no-op
         tagSocketFd(fd, options.statsTag, options.statsUid);