[native][fix] Fixed message height warnings on Android

Summary: Set the label's height to static value, to prevent message height warnings.

Test Plan:
Run the app on iOS and Android. Created new chat and checked if the warnings appear:

• new message,
• edited message,
• edited message with reaction,
• not edited message with reaction/sidebar.

Reviewers: michal, inka, ashoat

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7518