Merge "[Divider] Fix a crash because of null renderer" into main
diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/DividerPresenter.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/DividerPresenter.java
index 3fc409a..882a8d0 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/DividerPresenter.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/DividerPresenter.java
@@ -565,6 +565,7 @@
         return true;
     }
 
+    // Only called by onTouch() and mRenderer is already null-checked.
     @GuardedBy("mLock")
     private void onStartDragging(@NonNull MotionEvent event) {
         mVelocityTracker = VelocityTracker.obtain();
@@ -590,6 +591,7 @@
         });
     }
 
+    // Only called by onTouch() and mRenderer is already null-checked.
     @GuardedBy("mLock")
     private void onDrag(@NonNull MotionEvent event) {
         if (mVelocityTracker != null) {
@@ -660,8 +662,10 @@
 
     @GuardedBy("mLock")
     private void updateDividerPosition(int position) {
-        mRenderer.setDividerPosition(position);
-        mRenderer.updateSurface();
+        if (mRenderer != null) {
+            mRenderer.setDividerPosition(position);
+            mRenderer.updateSurface();
+        }
     }
 
     @GuardedBy("mLock")
@@ -669,7 +673,10 @@
         // Veil visibility change should be applied together with the surface boost transaction in
         // the wct.
         final SurfaceControl.Transaction t = new SurfaceControl.Transaction();
-        mRenderer.hideVeils(t);
+
+        if (mRenderer != null) {
+            mRenderer.hideVeils(t);
+        }
 
         // Callbacks must be executed on the executor to release mLock and prevent deadlocks.
         // mDecorSurfaceOwner may change between here and when the callback is executed,
@@ -684,8 +691,10 @@
                         }
                     });
         });
-        mRenderer.mIsDragging = false;
-        mRenderer.mDragHandle.setPressed(mRenderer.mIsDragging);
+        if (mRenderer != null) {
+            mRenderer.mIsDragging = false;
+            mRenderer.mDragHandle.setPressed(mRenderer.mIsDragging);
+        }
     }
 
     /**