Skip dropped mapped node in PropsAnimatedNode.updateView instead of crashing

A mapped child node can be removed from NativeAnimatedNodesManager (e.g.
its component unmounted during a navigation transition) between animation
frames while the prop node is still queued for an update. updateView()
then calls requireNotNull on the missing node and throws
IllegalArgumentException: "Mapped property node does not exist", crashing
the app on a benign teardown race. Skip the stale node instead, mirroring
the connectedViewTag == -1 early-return at the top of the method.

Fixes #37267.

Author: shashank-bhatotia

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/animated/PropsAnimatedNode.kt

@@ -75,7 +75,15 @@ internal class PropsAnimatedNode(
     }
     for ((key, value) in propNodeMapping) {
       val node = nativeAnimatedNodesManager.getNodeById(value)
-      requireNotNull(node) { "Mapped property node does not exist" }
+      // A mapped child node can be dropped (e.g. its component unmounted during
+      // navigation) between animation frames while this prop node is still
+      // queued for an update. Skip the stale node instead of throwing: the
+      // connected view is being torn down, so there is no meaningful value to
+      // write for this prop on this frame. Mirrors the connectedViewTag == -1
+      // early-return above. Fixes #37267.
+      if (node == null) {
+        continue
+      }
       if (node is StyleAnimatedNode) {
         node.collectViewUpdates(propMap)
       } else if (node is ValueAnimatedNode) {