Merge "Fix requestUnbufferedDispatch didn't work before window attached" into tm-qpr-dev am: 4bb3468daa am: 0375f4ef96

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21327619

Change-Id: Icc786f3b4feaf5175a35f31b351fb3fbee60a82b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/android/view/ViewRootImpl.java

@@ -1402,6 +1402,8 @@ public final class ViewRootImpl implements ViewParent,
                                 listener, listener.data, mHandler, true /*waitForPresentTime*/);
                         mAttachInfo.mThreadedRenderer.addObserver(mHardwareRendererObserver);
                     }
+                    // Update unbuffered request when set the root view.
+                    mUnbufferedInputSource = mView.mUnbufferedInputSource;
                 }
 
                 view.assignParent(this);