Bug 1069380 - Use link role instead of button for open action in cards view

Changes the button role on the screenshotView to link, and adds the aria-hidden=true attribute to the iconButton to hide it from AT's. Added tests to ensure the aria properties in the cards view.
Merge pull request #24863 from jobara/1069380

Bug 1069380 - Use link role instead of button for open action in cards view
Bug 1077331 - Only seek ringtone back to start on ringtone if the file is loaded fully enough to seek. r=etienne
Merge pull request #24909 from DouglasSherk/1077331-system-call-vibrate

Bug 1077331 - Only seek ringtone back to start on ringtone if the file is loaded fully enough to seek. r=etienne
Bug 1080285 - [Keyboard] Mock test dimensions so it will pass in any environment r=rudyl
Merge pull request #24963 from KevinGrandon/bug_1080285_keyboard_test_mock_dimensions

Bug 1080285 - [Keyboard] Mock test dimensions so it will pass in any environment
Bug 1080283 - Add wait in notification_launch_app_test r=kgrandon