Enable ImageGenerator tests on direct raster and direct gpu backends

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index 1e323cbdee5208b668302b70070a2adbc2aaf678..9a623620101f57afedf49b596fe909f7038bd32a 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -271,7 +271,9 @@ CodecSrc::CodecSrc(Path path, Mode mode, DstColorType dstColorType, SkAlphaType
 bool CodecSrc::veto(SinkFlags flags) const {
     // Test CodecImageGenerator on 8888, 565, and gpu
     if (kGen_Mode == fMode) {
-        return flags.type != SinkFlags::kRaster || flags.type != SinkFlags::kGPU ||
+        // For image generator, we want to test kDirect approaches for kRaster and kGPU,
+        // while skipping everything else.
+        return (flags.type != SinkFlags::kRaster && flags.type != SinkFlags::kGPU) ||
                 flags.approach != SinkFlags::kDirect;
     }