Fix vertical nav button direction issue

Bug: 32516898
Change-Id: I00d5478b9bef87918d59f3021a9368fd3f2e0c20
Test: locally on device
Merged-In: Id94f08c066db101f630e69874bcdefb177e6f0f5

packages/SystemUI/src/com/android/systemui/statusbar/phone/ButtonDispatcher.java

@@ -186,6 +186,16 @@ public class ButtonDispatcher {
         }
     }
 
+    public void setLandscape(boolean landscape) {
+        final int N = mViews.size();
+        for (int i = 0; i < N; i++) {
+            final View view = mViews.get(i);
+            if (view instanceof ButtonInterface) {
+                ((ButtonInterface) view).setLandscape(landscape);
+            }
+        }
+    }
+
     /**
      * Interface for button actions.
      */

packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java

@@ -578,6 +578,8 @@ public class NavigationBarView extends LinearLayout {
 
         updateTaskSwitchHelper();
         setNavigationIconHints(mNavigationIconHints, true);
+
+        getHomeButton().setLandscape(mVertical);
     }
 
     private void updateTaskSwitchHelper() {