Update baseline api docs

* add an image for better description
* add constraints between TextView height and padding
* fix broken link (getLineSpacing)

Test: make -offline-sdk-docs
Test: Visual inspection on generated doc, screenshot attached to ticket
Bug: 74032223
Change-Id: I34b91454d3a43f8cb5a450c8d34de9f1abde0d52
2 files changed