Disable indirect backends for image decode tests

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index dd994b609015e31d951df3eab3bc29cee631cafa..1e323cbdee5208b668302b70070a2adbc2aaf678 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -271,8 +271,8 @@ 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.approach != SinkFlags::kDirect) &&
-                flags.type != SinkFlags::kGPU;
+        return flags.type != SinkFlags::kRaster || flags.type != SinkFlags::kGPU ||
+                flags.approach != SinkFlags::kDirect;
     }
 
     // Test all other modes to direct raster backends (8888 and 565).