🎨 Palette: Add tooltips to audio and video player controls

[dlukt]

This PR adds android:tooltipText attributes to the icon-only playback buttons (play/pause, forward, rewind) in the audio and video viewer components.

💡 What: Added static XML attributes and dynamic Java updates for tooltips to media playback controls.
🎯 Why: To improve accessibility and user understanding on devices supporting long-press or mouse-hover interactions for icon-only buttons.
♿ Accessibility: Tooltips mirror the contentDescription natively on Android API 26+ devices, assisting mouse and stylus users without disrupting screen readers.

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PR created automatically by Jules for task 14608623517414763915 started by @dlukt

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