Refill all the dispatcher views when updating rotation

- Due to a change in ordering, the button dispatcher list is not complete
  until after inflation and the nav bar controller notifies the view of
  the current nav mode.  When this happens and the rotation button is
  updated, also update the list of views in the dispatcher list.

Bug: 229708157
Test: Enabled 3 button, kill SysUI, rotate and verify button shows
Change-Id: I20171f31cc485eb41a0def841e4b89b761bb63f2

packages/SystemUI/src/com/android/systemui/navigationbar/NavigationBarInflaterView.java

@@ -168,6 +168,7 @@ public class NavigationBarInflaterView extends FrameLayout
 
     public void setButtonDispatchers(SparseArray<ButtonDispatcher> buttonDispatchers) {
         mButtonDispatchers = buttonDispatchers;
+        clearDispatcherViews();
         for (int i = 0; i < buttonDispatchers.size(); i++) {
             initiallyFill(buttonDispatchers.valueAt(i));
         }
@@ -454,12 +455,16 @@ public class NavigationBarInflaterView extends FrameLayout
         }
     }
 
-    private void clearViews() {
+    private void clearDispatcherViews() {
         if (mButtonDispatchers != null) {
             for (int i = 0; i < mButtonDispatchers.size(); i++) {
                 mButtonDispatchers.valueAt(i).clear();
             }
         }
+    }
+
+    private void clearViews() {
+        clearDispatcherViews();
         clearAllChildren(mHorizontal.findViewById(R.id.nav_buttons));
         clearAllChildren(mVertical.findViewById(R.id.nav_buttons));
     }

packages/SystemUI/src/com/android/systemui/navigationbar/NavigationBarView.java

@@ -538,6 +538,7 @@ public class NavigationBarView extends FrameLayout {
             mRotationButtonController.setRotationButton(mRotationContextButton,
                     mRotationButtonListener);
         }
+        mNavigationInflaterView.setButtonDispatchers(mButtonDispatchers);
     }
 
     public KeyButtonDrawable getBackDrawable() {