Update the ICU data file asset path in the devicelab tests (#18854)

dev/devicelab/lib/tasks/perf_tests.dart

diff --git a/dev/devicelab/lib/tasks/perf_tests.dart b/dev/devicelab/lib/tasks/perf_tests.dart
index dac3425..cc19322 100644
--- a/dev/devicelab/lib/tasks/perf_tests.dart
+++ b/dev/devicelab/lib/tasks/perf_tests.dart
@@ -395,7 +395,7 @@
       fileToMetadata[entry.path] = entry;
     }
 
-    final _UnzipListEntry icudtl = fileToMetadata['assets/icudtl.dat'];
+    final _UnzipListEntry icudtl = fileToMetadata['assets/flutter_shared/icudtl.dat'];
     final _UnzipListEntry libflutter = fileToMetadata['lib/armeabi-v7a/libflutter.so'];
     final _UnzipListEntry isolateSnapshotData = fileToMetadata['assets/isolate_snapshot_data'];
     final _UnzipListEntry isolateSnapshotInstr = fileToMetadata['assets/isolate_snapshot_instr'];