Add HTML support in RMF title

[nalcalag]

Task/Issue URL: https://app.asana.com/0/1201807753394693/1207619945513388/f

Description

Support HTML text in RMF title

Steps to test this PR

• [ ] Change endpoint in RemoteMessagingService to https://www.jsonblob.com/api/1248254773076811776
• [ ] Fresh install
• [ ] Finish onboarding
• [ ] Check new message appears and title looks fine
• [ ] Tap fire button and clear data
• [ ] Check the same message appears but with a line break in the title

No UI changes

[nalcalag]

• #4672 👈
• develop

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