Support RGBA/BGRA swizzles using SkEncodedInfo

src/codec/SkRawCodec.cpp

Index: src/codec/SkRawCodec.cpp
diff --git a/src/codec/SkRawCodec.cpp b/src/codec/SkRawCodec.cpp
index c1a44eb32e5f110e39feaeb5c90484c13eadd2d3..a6dda2424353df551e1a99d63616e164d4c39a0c 100644
--- a/src/codec/SkRawCodec.cpp
+++ b/src/codec/SkRawCodec.cpp
@@ -672,7 +672,7 @@ SkCodec::Result SkRawCodec::onGetPixels(const SkImageInfo& requestedInfo, void*
     }
 
     SkAutoTDelete<SkSwizzler> swizzler(SkSwizzler::CreateSwizzler(
-            SkSwizzler::kRGB, nullptr, requestedInfo, options));
+            this->getEncodedInfo(), nullptr, requestedInfo, options));
     SkASSERT(swizzler);
 
     const int width = requestedInfo.width();