Fix to allow SYSTEM_UID to display windows.

Was not previously checking to make sure that the appId was not
SYSTEM_UID (1000). This caused certain system windows to fail to
appear.

Change-Id: I939dc2f8a256acb84b7c413c7e00003a89aff6d4
diff --git a/services/java/com/android/server/wm/WindowStateAnimator.java b/services/java/com/android/server/wm/WindowStateAnimator.java
index b213b29..2c9f7f3 100644
--- a/services/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/java/com/android/server/wm/WindowStateAnimator.java
@@ -1302,7 +1302,7 @@
     boolean performShowLocked() {
         if (mWin.isOtherUsersAppWindow()) {
             Slog.w(TAG, "Current user " + mService.mCurrentUserId + " trying to display "
-                    + this + ", type " + mWin.mAttrs.type + ", belonging to " + mWin.mOwnerUserId);
+                    + this + ", type " + mWin.mAttrs.type + ", belonging to " + mWin.mOwnerUid);
             return false;
         }
         if (DEBUG_VISIBILITY || (DEBUG_STARTING_WINDOW &&