[BugFix] Stop foldview fling before expansion

- Stop FoldViewLayoutNG and AppBarLayout fling before applying setFoldExpanded offsets.
- Guard posted fling frames with a generation counter so canceled fling work cannot update the offset later.
- Add Android instrumentation coverage for stopping the scroller and resetting behavior fling state.

issue:m-7328710665

AutoLand: release/3.9,release/3.8

AutoSubmit:True

QuickRun: True

Author: AdrianLCA

platform/android/lynx_xelement/lynx_xelement_scroll_coordinator/src/main/java/com/lynx/xelement/scroll/coordinator/LynxUIScrollCoordinator.kt

@@ -444,6 +444,7 @@ open class LynxUIScrollCoordinator(
       if (params.hasKey("smooth")) {
         enableAnimation = params.getBoolean("smooth")
       }
+      coordinatorLayout.stopFling()
       if (enableAnimation) {
         animateToOffset(offsetPx = offset)
       } else {

platform/android/lynx_xelement/lynx_xelement_scroll_coordinator/src/main/java/com/lynx/xelement/scroll/coordinator/ScrollCoordinatorAppBarLayout.java

@@ -66,6 +66,12 @@ public void setTouchStopFlingEnabled(boolean enabled) {
     enableTouchStopFling = enabled;
   }
 
+  public void stopFling() {
+    Behavior behavior = (Behavior) getBehavior();
+    behavior.stopAppBarLayoutFling(this);
+    behavior.resetFlingStatus();
+  }
+
   class Behavior extends AppBarLayout.Behavior {
     private static final int TYPE_FLING = 1;
     private boolean isFlinging;
@@ -288,11 +294,15 @@ public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout chi
     public void onStopNestedScroll(
         CoordinatorLayout coordinatorLayout, AppBarLayout appBarLayout, View target, int type) {
       super.onStopNestedScroll(coordinatorLayout, appBarLayout, target, type);
-      isFlinging = false;
-      shouldBlockNestedScroll = false;
+      resetFlingStatus();
       if (scrollListener != null) {
         scrollListener.onScrollStop();
       }
     }
+
+    private void resetFlingStatus() {
+      isFlinging = false;
+      shouldBlockNestedScroll = false;
+    }
   }
 }

platform/android/lynx_xelement/lynx_xelement_scroll_coordinator/src/main/java/com/lynx/xelement/scroll/coordinator/ScrollCoordinatorLayout.kt

@@ -38,6 +38,7 @@ class ScrollCoordinatorLayout(
   private val childHelper = NestedScrollingChildHelper(this)
   private var velocityTracker: VelocityTracker? = null
   private val scroller = OverScroller(context)
+  private var flingGeneration = 0
   private var lastTouchY = 0
   private val scrollOffset = IntArray(2)
   private val scrollConsumed = IntArray(2)
@@ -99,6 +100,18 @@ class ScrollCoordinatorLayout(
     velocityTracker = null
   }
 
+  private fun stopOwnFling() {
+    flingGeneration++
+    if (!scroller.isFinished) {
+      scroller.forceFinished(true)
+    }
+  }
+
+  fun stopFling() {
+    stopOwnFling()
+    appBarLayoutView.stopFling()
+  }
+
   private fun shouldSkipGestureConsumption(event: MotionEvent?): Boolean {
     return coordinatorHost.isEnableNewGesture &&
       (consumeGesture != null && !consumeGesture!!) &&
@@ -154,9 +167,7 @@ class ScrollCoordinatorLayout(
     val y = (motionEvent.y + 0.5f).toInt()
     when (motionEvent.actionMasked) {
       MotionEvent.ACTION_DOWN -> {
-        if (!scroller.isFinished) {
-          scroller.forceFinished(true)
-        }
+        stopOwnFling()
         lastTouchY = y
         isScrolling = false
         nestedOffsets[0] = 0
@@ -213,6 +224,7 @@ class ScrollCoordinatorLayout(
           if (abs(velocityY) > minimumVelocity) {
             val currentOffset = appBarLayoutView.topAndBottomOffset
             val totalScrollRange = appBarLayoutView.totalScrollRange
+            flingGeneration++
             scroller.fling(0, currentOffset, 0, velocityY.toInt(), 0, 0, -totalScrollRange, 0)
             ViewCompat.postInvalidateOnAnimation(this)
           }
@@ -272,9 +284,7 @@ class ScrollCoordinatorLayout(
       MotionEvent.ACTION_DOWN -> {
         lastXIntercept = event.x
         lastYIntercept = event.y
-        if (!scroller.isFinished) {
-          scroller.forceFinished(true)
-        }
+        stopOwnFling()
         if (nestedScrollAsChild) {
           lastTouchY = (event.y + 0.5f).toInt()
           startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL, ViewCompat.TYPE_TOUCH)
@@ -524,9 +534,12 @@ class ScrollCoordinatorLayout(
 
   override fun computeScroll() {
     if (nestedScrollAsChild && scroller.computeScrollOffset()) {
+      val generation = flingGeneration
       val dy = scroller.currY - appBarLayoutView.topAndBottomOffset
       ViewCompat.postOnAnimation(this) {
-        scrollSelf(-dy)
+        if (generation == flingGeneration) {
+          scrollSelf(-dy)
+        }
       }
       ViewCompat.postInvalidateOnAnimation(this)
     }