Fixing a NPE in accessibility manager service.

There was a missing null checks as a result of a recent
refactoring.

bug:8185435

Change-Id: I3a1e256b434755b3a27f609dd2b6aeec31aa9a4f
diff --git a/services/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/java/com/android/server/accessibility/AccessibilityManagerService.java
index aadb790..e6cabdc 100644
--- a/services/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -565,8 +565,9 @@
             UserState userState = getCurrentUserStateLocked();
             // Automation service is not bound, so pretend it died to perform clean up.
             if (userState.mUiAutomationService != null
-                    && userState.mUiAutomationService.mServiceInterface != null
                     && serviceClient != null
+                    && userState.mUiAutomationService != null
+                    && userState.mUiAutomationService.mServiceInterface != null
                     && userState.mUiAutomationService.mServiceInterface.asBinder()
                     == serviceClient.asBinder()) {
                 userState.mUiAutomationService.binderDied();