[NUI] Sync master branch (#1149)

[NUI] Sync master branch (#1149)

* [NUI] Padding bug in LayoutGroup fixed (#1136)

LayoutGroup measuring child without using the parent's padding.
Resulted in LinearLayout not reducing the childs size when padding applied to parent

* [NUI] Prevent Height and Width specs being overwritten (#1142)

When setting the WidthSpecification or HeightSpecification with an exact value
the Size.Width or Size.Height is set but this in turns triggers a callback which
sets Size(width,height) but uses the stored height or width value which may not be
the set Width or Height Specification hence sets them to 0;

Change-Id: I80a4e1166f35e4c09c116916262ac965de54b048

* [NUI] Workaround: fix CustomAlgorithmInterface crash error occurred only in emulator, will be removed later after a proper solution is found (#1144)

- fix CSharp_Dali_GetOriginalImageSize spelling error- fix CSharp_Dali_GetOriginalImageSize spelling error
- add "GetOriginalImageSizeTest.cs" as sample APP.

* [NUI] Publish LottieAnimationView : TCSACR-293 (#1129)

* Revert "[NUI] Publish LottieAnimationView : TCSACR-293 (#1129)"

This reverts commit 3860d0bc8135ba980c3cc63da61ff670e281eb00.