Restrict dock sides after rotation

Bug: 27167078
Change-Id: If51626b75321eebc277eb2399ee753ffe489642b
diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 44afbcc..c207aea 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -25,6 +25,9 @@
 import static android.content.pm.PackageManager.FEATURE_WATCH;
 import static android.content.res.Configuration.UI_MODE_TYPE_CAR;
 import static android.content.res.Configuration.UI_MODE_TYPE_MASK;
+import static android.view.WindowManager.DOCKED_TOP;
+import static android.view.WindowManager.DOCKED_LEFT;
+import static android.view.WindowManager.DOCKED_RIGHT;
 import static android.view.WindowManager.LayoutParams.*;
 import static android.view.WindowManagerPolicy.WindowManagerFuncs.CAMERA_LENS_COVERED;
 import static android.view.WindowManagerPolicy.WindowManagerFuncs.CAMERA_LENS_COVER_ABSENT;
@@ -6098,6 +6101,17 @@
         }
     }
 
+    @Override
+    public boolean isDockSideAllowed(int dockSide) {
+
+        // We do not allow all dock sides at which the navigation bar touches the docked stack.
+        if (!mNavigationBarCanMove) {
+            return dockSide == DOCKED_TOP || dockSide == DOCKED_LEFT || dockSide == DOCKED_RIGHT;
+        } else {
+            return dockSide == DOCKED_TOP || dockSide == DOCKED_LEFT;
+        }
+    }
+
     void sendCloseSystemWindows() {
         PhoneWindow.sendCloseSystemWindows(mContext, null);
     }