Use LocalService to access UserManagerServcie from DragState.

It allows us to replace UserManagerServcie with a mock when writing
tests for DragState.

Bug: 70601660
Test: com.android.server.wm.DragDropControllerTests,
      android.server.wm.CrossAppDragAndDropTests,
      manually check the drag and drop behavior on test app.

Change-Id: I2db9cbe1e1b3542ecd7d60b26fc0e7b322041eb4
diff --git a/services/core/java/com/android/server/wm/DragState.java b/services/core/java/com/android/server/wm/DragState.java
index b9f437a..f0fffb9 100644
--- a/services/core/java/com/android/server/wm/DragState.java
+++ b/services/core/java/com/android/server/wm/DragState.java
@@ -42,6 +42,7 @@
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.os.IUserManager;
+import android.os.UserManagerInternal;
 import android.util.Slog;
 import android.view.Display;
 import android.view.DragEvent;
@@ -55,6 +56,7 @@
 import android.view.animation.Interpolator;
 
 import com.android.internal.view.IDragAndDropPermissions;
+import com.android.server.LocalServices;
 import com.android.server.input.InputApplicationHandle;
 import com.android.server.input.InputWindowHandle;
 
@@ -318,15 +320,9 @@
 
         mSourceUserId = UserHandle.getUserId(mUid);
 
-        final IUserManager userManager =
-                (IUserManager) ServiceManager.getService(Context.USER_SERVICE);
-        try {
-            mCrossProfileCopyAllowed = !userManager.getUserRestrictions(mSourceUserId).getBoolean(
-                    UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE);
-        } catch (RemoteException e) {
-            Slog.e(TAG_WM, "Remote Exception calling UserManager: " + e);
-            mCrossProfileCopyAllowed = false;
-        }
+        final UserManagerInternal userManager = LocalServices.getService(UserManagerInternal.class);
+        mCrossProfileCopyAllowed = !userManager.getUserRestriction(
+                mSourceUserId, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE);
 
         if (DEBUG_DRAG) {
             Slog.d(TAG_WM, "broadcasting DRAG_STARTED at (" + touchX + ", " + touchY + ")");