fix: update thumb message layout

[OtavioStasiak]

Proposed changes

Reduce the thumb image size and adjust the reply component layout to improve its distribution and optimize the space occupied by the message.

Issue(s)

https://rocketchat.atlassian.net/browse/NATIVE-622

How to test or reproduce

If you have one room with a message that have a thumb URL you can open this room, or you can mock this messages on List component:

Screenshots

IOS

Before - After

Android

Before - After

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

[CLAassistant]

All committers have signed the CLA.

[diegolmello]

Just a typo.
Create a channel on our workspace, send those messages and add to PR description.
It's going to make review and QA easier.

[diegolmello]

Images on before and after look the same.