Changes to framework for ToT Skia.

Consists of 3 cherry-pick from changes by robertphillips@google.com
in master-skia:

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New AndroidPicture wrapper class

Address code review comments & use new SkPictureRecorder::partialReplay
entry point

Addressing code review issues

Switch MakePartialCopy to makePartialCopy

Conflicts:
	core/jni/android/graphics/Picture.cpp

Ie530ab15b3d549f0ecfb0ecc131f9144a7b72a91

Remove AndroidPicture from GraphicsJNI and split into .h and .cpp

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Fix lingering legacy picture recording behavior
Address code review issues

Iaf870c2c400dbe70dc32d6d445574904f5ea718f

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Update Android to new SkCanvas::drawPicture interface

As of Skia 9b14f26d (Alter SkCanvas::drawPicture (devirtualize,
take const SkPicture, take pointer) -
https://codereview.chromium.org/313613004) SkCanvas::drawPicture
has an alternate signature. The old entry point is deprecated.

I63395da61ecc3b58bfd2bc094752081f4b2f7535

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Change-Id: I041133aeb5639abd853370e512acf93870f82aea