Revert of Make SkAndroidCodec support ico

src/codec/SkAndroidCodec.cpp

Index: src/codec/SkAndroidCodec.cpp
diff --git a/src/codec/SkAndroidCodec.cpp b/src/codec/SkAndroidCodec.cpp
index 70f66ce24da5738f0d0ae9700756cb5f0b4fd33d..86c067558f0d9b857d86ee8ce98f141fe852b416 100644
--- a/src/codec/SkAndroidCodec.cpp
+++ b/src/codec/SkAndroidCodec.cpp
@@ -34,9 +34,11 @@
         case kWBMP_SkEncodedFormat:
         case kBMP_SkEncodedFormat:
         case kGIF_SkEncodedFormat:
-        case kICO_SkEncodedFormat:
             return new SkSampledCodec(codec.detach());
         default:
+            // FIXME: SkSampledCodec is temporarily disabled for other formats
+            // while focusing on the formats that are supported by
+            // BitmapRegionDecoder.
             return nullptr;
     }
 }