Cache correct calling UID for VcnStatusCallbacks.

This CL updates VcnManagementService to cache the correct UID for the
caller when a VcnStatusCallback is registered. Previously,
getBinderCallingUid() was checked after the calling identity was
cleared.

Bug: 183437200
Test: atest FrameworksVcnTests CtsVcnTestCases
Change-Id: Idfa2d2aad6bc03b3d08a137f9913276057632a3b

services/core/java/com/android/server/VcnManagementService.java

@@ -821,8 +821,7 @@ public class VcnManagementService extends IVcnManagementService.Stub {
 
             final IBinder cbBinder = callback.asBinder();
             final VcnStatusCallbackInfo cbInfo =
-                    new VcnStatusCallbackInfo(
-                            subGroup, callback, opPkgName, mDeps.getBinderCallingUid());
+                    new VcnStatusCallbackInfo(subGroup, callback, opPkgName, callingUid);
 
             try {
                 cbBinder.linkToDeath(cbInfo, 0 /* flags */);