[Accessibility] Make message view more voiceover friendly

[BillCarsonFr]

• Cell is now accessible and will speak sender name and message
• Accessory button has now an accessibility label
• Post announcement when message is received
• Added accessibility label to toolbar’s text view
• Notice : I cannot do all the translation, will need some help

[jessesquires]

thanks @BillCarsonFr ! i'll have a look soon 👍

[BillCarsonFr]

just noticed that i forgot to add the method to configure the cell accessibility in the .h, only updated the .m. I have been doing too much swift :)

[anamika217]

Yesterday I got a message that Telegram has been updated to version 3.3.2
In the new version, accessibility feature for sender name is not active. Will it be provided in next update?
Thanks in advance!

[eliburke]

@BillCarsonFr can you update your PR?

@jessesquires This appears to work as advertised. I think it could use improvement, but it's a solid start.

Media cells with interactive behavior (Audio, Video) do not work with voiceover enabled. I think that in order to add that functionality we would need to add a property to the mediaItem that returns an array of views that JSQMessagesCollectionViewCell can expose via accessabilityElements. We could also add a media type / name property to further differentiate between different cell types.

I also noticed some differences between how it behaves and how iMessage behaves, but I'm just pointing them out.

• Does not announce timestamps
• Does not indicate if there are actions available (e.g. long press menu)
• Announces the local sender's name (iMessage says "Your iMessage")

[codecov-io]

Current coverage is 66.40%

Merging #886 into develop will increase coverage by +0.10% as of 8ee4b27

@@            develop   #886   diff @@
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  Files            63     63       
  Stmts          2321   2331    +10
  Branches          0      0       
  Methods                          
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+ Hit            1539   1548     +9
  Partial           0      0       
- Missed          782    783     +1

Review entire Coverage Diff as of 8ee4b27

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[jessesquires]

@eliburke 👍

[jessesquires]

Maybe we can consider more accessibility for v8.0