Merge "Enable only clickable section header elements a11y" into tm-dev am:...

Merge "Enable only clickable section header elements a11y" into tm-dev am: fe8c8950 am: 572c14ee

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17080999

Change-Id: I46841d479a27123d0db13fc68e0a6d3f7f53a15b