RESTRICT AUTOMERGE: Fix heap buffer overflow
RESTRICT AUTOMERGE: Fix heap buffer overflow

Bug: b/118143775
Bug: oss-fuzz:11040
Test: I5fe66d06078f3bc674ceab4fbc8aae2ab67bfe1a

Because we're sampling, the offset ends up the same as the width. Back
up to the left enough to fit the bytes we will write.

Include SafetyNet logging from
https://skia-review.googlesource.com/c/skia/+/171227

Change-Id: Ie476a0191b66c2322446b9c0922f630d6e971645
Reviewed-on: https://skia-review.googlesource.com/c/164262

aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia