Fix crashes when reloading app quickly on Android

android/src/main/java/com/swmansion/reanimated/layoutReanimation/ReanimatedNativeHierarchyManager.java

@@ -189,6 +189,16 @@
   }
 
   public boolean isLayoutAnimationEnabled() {
+    // In case the user rapidly reloads the app, there is a possibility that the active instance may
+    // not be available.
+    // However, the code will still attempt to trigger the layout animation of views that are going
+    // to be dropped.
+    // This is required as without it, the `mAnimationsManager.isLayoutAnimationEnabled`
+    // would crash when trying to get the uiManager from the context.
+    if (!mContext.hasActiveReactInstance()) {
+      return false;
+    }
+
     maybeInit();
     return mAnimationsManager.isLayoutAnimationEnabled();
   }
@@ -424,7 +434,7 @@
       cleanerCallback.remove(view.getId());
       runnable.run();
     }
     // childrens' callbacks should be cleaned by former publicDropView calls as Animation Manager
     // stripes views from bottom to top
     super.dropView(view);
   }