Disable reporting own messages

Summary:
Related: ENG-1915, D5109,
We don't want users to see 'Report' option in tooltip for their own messages

Test Plan:
See that pressing a text message/long pressing a multimedia message that the user sent shows a tooltip without the 'Report' option, but doing the same to a message sent by a different user shows a
toolitp that includes this option.

Reviewers: tomek, michal, abosh

Reviewed By: tomek

Subscribers: ashoat, atul, abosh

Differential Revision: https://phab.comm.dev/D5282