784e09d Reland ICU update to 64.2 (flutter/engine#13216)

engine-flutter-autoroll · engine-flutter-autoroll · commit c421c0f97db2 · 2019-10-18T17:24:08.000Z
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
@@ -1 +1 @@
-4332316d2d44f725ed5277dabfdc961205848924
+784e09d333f1cbf4473be33e8ef5f7b6cd7800dd
