tree 16465480f680b071e88412e68332da3a3522bc8b
parent ec6f61b2fe64377b8729eead8598f571b7aeaf51
author chihhangchuang <chihhangchuang@google.com> 1591601575 +0800
committer chihhangchuang <chihhangchuang@google.com> 1591602000 +0800

Add content description for preview card of Theme and Grid

Talkback would read "Style preview, double-tap to activate" for theme small preview, and read "Style preview" for theme full preview. And also grid preview.
Video: https://drive.google.com/file/d/11meCX_GTjkDQokJQv9abwfsuGRSL6vpU/view?usp=sharing

Test: Manually
Bug: 157111975
Change-Id: Ieaafad0b6ccc1102bb127f692f6af6b72bc4918a