* Announce expanded/collapsed state on the timeline group header
GroupHeaderView (the accordion-style header used for grouped state
events in the timeline) uses toggleable() combined with
clearAndSetSemantics { contentDescription = text }. The
clearAndSetSemantics block discards the state information that
toggleable() would otherwise expose, so TalkBack never announces
whether the group is currently expanded or collapsed.
Add an explicit stateDescription (two new a11y_state_expanded /
a11y_state_collapsed strings in temporary.xml) alongside the existing
contentDescription so the expanded/collapsed state is communicated to
assistive technology.
Internal note: this single-file/single-root-cause fix addresses three
separate BITV findings raised in the same accessibility audit against
this component's toggle semantics.
* Update screenshots
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Co-authored-by: ElementBot <android@element.io>
Jürgen Wischer
3cef8c2796