Screen record a11y fixes

Audio switch: add content description, minimum width, and fix weights so
that is visible in largest display size
Make panel scrollable so that everything can be viewed in landscape mode

Fixes: 153606009
Fixes: 153521498
Fixes: 153619008
Fixes: 153617098
Test: manual

Change-Id: I72a5299b57eb4d03795db5dcd4892dca2d681f84