Fix crash in Keyboard Shortcuts Helper logging

Bug: 28889634
Change-Id: Ib33ee0bf4d68916e132f0044f4f720db27e7187d
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/KeyboardShortcuts.java b/packages/SystemUI/src/com/android/systemui/statusbar/KeyboardShortcuts.java
index 215fc34..3df12cd 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/KeyboardShortcuts.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/KeyboardShortcuts.java
@@ -151,10 +151,10 @@
     }
 
     public static void dismiss() {
-        MetricsLogger.hidden(sInstance.mContext,
-                MetricsProto.MetricsEvent.KEYBOARD_SHORTCUTS_HELPER);
         synchronized (sLock) {
             if (sInstance != null) {
+                MetricsLogger.hidden(sInstance.mContext,
+                        MetricsProto.MetricsEvent.KEYBOARD_SHORTCUTS_HELPER);
                 sInstance.dismissKeyboardShortcuts();
                 sInstance = null;
             }