Add flag to stage removing legacy filter behavior

See skia change: https://skia-review.googlesource.com/c/skia/+/345170

TBR=fmalita

Bug: skia:7650
Change-Id: I0540e55a0ce00b36d1c7fe13b996a3a57d0175a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2597643Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Cr-Commit-Position: refs/heads/master@{#838573}

skia/config/SkUserConfig.h

@@ -221,6 +221,10 @@ SK_API void SkDebugf_FileLine(const char* file,
 #define SK_SUPPORT_LEGACY_AAA_CHOICE
 #endif
 
+#ifndef SK_SUPPORT_LEGACY_SPRITE_IGNORE_HQ
+#define SK_SUPPORT_LEGACY_SPRITE_IGNORE_HQ
+#endif
+
 #ifndef GR_OP_ALLOCATE_USE_NEW
 #define GR_OP_ALLOCATE_USE_NEW
 #endif