fix: add contentDescription to selection-state icons for screen readers

[kunwarshivamjsr]

What this fixes

Adds proper contentDescription values to selection-state icons (CheckCircle/RadioButtonUnchecked) in SettingsScreen.kt (IPTV playlist and catalog selection rows). Previously these used contentDescription = null, so TalkBack gave no audio feedback on whether an item was selected when navigating with a D-pad on Android TV.

Changes

• Added item_selected / item_not_selected string resources in strings.xml
• Updated 2 icon usages in IptvSettings() and CatalogsSettings() composables to use stringResource() reflecting current selection state

Testing

• Verified the project builds successfully (./gradlew :app:assemblePlayDebug — BUILD SUCCESSFUL)
• Scope limited to 2 files for this initial PR per discussion in [A11y] Selection-state icons (Check/CheckCircle/RadioButtonUnchecked) missing contentDescription for screen reader users #399; happy to follow up with remaining occurrences in a separate PR if this looks good

Closes #399

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🙏 First-time contributor here for GSSoC — would appreciate a review and the gssoc:approved + difficulty label if this looks good. Thanks!

[ProdigyV21]

Can you show screenshots and tests of how it looks and works inside app?

[kunwarshivamjsr]

Hi @ProdigyV21 — this fix changes contentDescription on the selection-state icons from null to a stringResource that reflects the current state ("Selected" / "Not selected"), so TalkBack announces the state when a user navigates to a row with a D-pad.

Since this is a screen-reader accessibility fix rather than a visual change, it isn't visible in a static screenshot — the behaviour surfaces only through TalkBack's audio output.

I don't currently have access to an Android TV device to record a TalkBack demo. If you can run the build locally, the change is in SettingsScreen.kt (IptvSettings and CatalogsSettings composables) — navigate to playlist/catalog selection with TalkBack enabled and it should now announce the selection state correctly.

Happy to try setting up an emulator and recording a screen capture if that would help. Let me know!