Update to call new Skia APIs.

I816129d49c0118453222916f3c818eccac33663d merges a new version of
Skia that updates various APIs. Call the new ones.

SkBitmap::copyTo now takes an SkColorType instead of an
SkBitmap::Config, so do the conversion with
SkBitmapConfigToColorType or use the enum when it makes sense.

Call SkImageDecoder::decodeSubset instead of (deprecated)
SkImageDecoder::decodeRegion.

Override SkCanvas::ClipVisitor::clipRRect in ClipCopier.

In Canvas::clip calls, call SkCanvas::isClipEmpty(), which was
previously called inside the clip call, to determine the return value.

For various SkPaint effects, call the new factories (as the constructors
have been made protected).

Implement SkJavaOutputStream::bytesWritten(), overriding a new pure
virtual function on SkWStream.

Update Matrix calls to always return true (since SkMatrix calls no
longer return a value).

Depends on I816129d49c0118453222916f3c818eccac33663d (skia).

Change-Id: I5cdcea827ebff587df0bbddc0965e3e0fbf48002