Accessibility audit fixes

[seeReadCode]

Priority for text, hints, etc.

• [x] Accessibility headers above the containers for both rooms and tags
• [x] Test back and cancel accessibility within contribute
• [x] Add player heading
• [x] Elapsed and total duration in accessibilityLabel not on header
• [x] Don't say milliseconds in time
• [ ] "Contribute about plates" in heading accessibility label and hide label below
• [x] Change Audio to Record after audio is selected
• [ ] Record/Text tap before questions answer should display modal repeating instructions
• [ ] Instruction - To contribute please answer a few questions about yourself
• [ ] Focus should not reset when a tag is selected on tag view
• [ ] Need to test image gallery (check for image alt)
• [x] Read view should have individual ui items per entry

@sinabahram hints

• [x] Map hint
• [x] Previous hint
• [x] Playback hint
• [x] Next hint
• [x] Contribute hint
• [x] Text contibute hint
• [x] Audio contribute hint

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• [ ] Separate UIViews for text contributions and add ordinality
• [ ] akpickerview fix (see #6)
• [ ] map view should be accessible (see #19)

[seeReadCode]

re akpickerview issue c81173a59b35d4f6c71f2dc61e296146