Add SkEncodedInfo to report properties of encoded image data

src/codec/SkJpegDecoderMgr.h

Index: src/codec/SkJpegDecoderMgr.h
diff --git a/src/codec/SkJpegDecoderMgr.h b/src/codec/SkJpegDecoderMgr.h
index 7d34b67a0c0ab31d1ccaae32e55e728b848ef8f8..85df1831160561e7adcc9917769e79af6c84908d 100644
--- a/src/codec/SkJpegDecoderMgr.h
+++ b/src/codec/SkJpegDecoderMgr.h
@@ -45,9 +45,10 @@ public:
     void  init();
 
     /*
-     * Recommend a color type based on the encoded format
+     * Returns the encoded color type of the jpeg, or kUnknown if the
+     * color type can't be determined
      */
-    SkColorType getColorType();
+    SkEncodedInfo::Color getEncodedColor();
 
     /*
      * Free memory used by the decode manager