Use sRGB pixel config for ARGB masks (color emoji)

src/gpu/text/GrBatchFontCache.cpp

Index: src/gpu/text/GrBatchFontCache.cpp
diff --git a/src/gpu/text/GrBatchFontCache.cpp b/src/gpu/text/GrBatchFontCache.cpp
index faafc16a13c022fabd80fee97b04064ca1617f52..3e212cd1713b69afb150a2dfdf407954caa07e37 100644
--- a/src/gpu/text/GrBatchFontCache.cpp
+++ b/src/gpu/text/GrBatchFontCache.cpp
@@ -18,7 +18,7 @@
 bool GrBatchFontCache::initAtlas(GrMaskFormat format) {
     int index = MaskFormatToAtlasIndex(format);
     if (!fAtlases[index]) {
-        GrPixelConfig config = MaskFormatToPixelConfig(format);
+        GrPixelConfig config = MaskFormatToPixelConfig(format, *fContext->caps());
         int width = fAtlasConfigs[index].fWidth;
         int height = fAtlasConfigs[index].fHeight;
         int numPlotsX = fAtlasConfigs[index].numPlotsX();