Mark title & subtitle focusable, set selected unless a11y active

Marking title and subtitle important for accessibility to meet a11y
requirements. Title and subtitle are also set as selected to enable marquee, unless talkback is on, to avoid announcing "selected" (b/210363098 for context)

Test: Manually verified title & subtitle are focusable, not preceded by “Selected” in talkback
Fixes: 289000676
Change-Id: Ie070229e3798e9a3f91130cf83507b9efbfce6c0