IWYU RegionHelper += <limits>

Test: compiles when transitive dependency is removed
Bug: 35363681
Change-Id: Ia405e41102e6ded07720e424167df7e4d080581e
diff --git a/include/private/ui/RegionHelper.h b/include/private/ui/RegionHelper.h
index a22b2cb..6c2ad4f 100644
--- a/include/private/ui/RegionHelper.h
+++ b/include/private/ui/RegionHelper.h
@@ -20,6 +20,8 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#include <limits>
+
 namespace android {
 // ----------------------------------------------------------------------------