Just print warning log instead of triggering WTF

TrustManagerService.getUserId() not trigger WTF when receiving
broadcast USER_STARTED with userID = 0.

Bug: 155946337
Test: manual, flash AGO ENG image and then boot up
Change-Id: Id2ea54d8f4c25bd97b6213c431d18e44908d7e11

services/core/java/com/android/server/trust/TrustManagerService.java

@@ -1469,7 +1469,7 @@ public class TrustManagerService extends SystemService {
             if (userId > 0) {
                 return userId;
             } else {
-                Slog.wtf(TAG, "EXTRA_USER_HANDLE missing or invalid, value=" + userId);
+                Log.w(TAG, "EXTRA_USER_HANDLE missing or invalid, value=" + userId);
                 return -100;
             }
         }