fix the build
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index d628a3b..2c82d9c 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -98,6 +98,7 @@
 import android.util.Config;
 import android.util.EventLog;
 import android.util.Slog;
+import android.util.Log;
 import android.util.PrintWriterPrinter;
 import android.util.SparseArray;
 import android.view.Gravity;
@@ -4695,7 +4696,7 @@
                 }
             }
         } catch (InterruptedException e) {
-            Slog.wtf(TAG, e);
+            Log.wtf(TAG, e);
         } finally {
             observer.stopWatching();
         }