Fix potential null pointer exeption in keyguard

The code was adding default widgets before setting mViewStateManager, which means the
callback from the transport control might access mViewStateManager before it's set.

Change-Id: I985a3c8062d0660519cb4a4c8c1b42c7c90f4ac7

Author: Jim Miller

policy/src/com/android/internal/policy/impl/keyguard/KeyguardHostView.java

@@ -153,10 +153,11 @@ protected void onFinishInflate() {
         mAppWidgetContainer.setCallbacks(mWidgetCallbacks);
         mAppWidgetContainer.setMinScale(0.5f);
 
+        mViewStateManager = new KeyguardViewStateManager();
+
         addDefaultWidgets();
         addWidgetsFromSettings();
 
-        mViewStateManager = new KeyguardViewStateManager();
         SlidingChallengeLayout slider =
                 (SlidingChallengeLayout) findViewById(R.id.sliding_layout);
         if (slider != null) {