[M126-LTS][ganesh] Avoid int overflow in PatternHelper

The callers of PatternHelper which are not updated here pass in a TArray
size as repeatCount, which already prevents overflow:
https://crsrc.org/c/third_party/skia/include/private/base/SkTArray.h?q=kMaxCapacity

Bug: b/361461526
Change-Id: I86c494cb00223f0bb8d68540d33d7230b60c9486
Commit-Queue: James Godfrey-Kittle <jamesgk@google.com>
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/898036
(cherry picked from commit cbb40e2aee54cd02f36b6f95f7f23a17c41d4728)
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/913076
Commit-Queue: Roger Felipe Zanoni da Silva (xWF) <rzanoni@google.com>
Reviewed-by: James Godfrey-Kittle <jamesgk@google.com>