chore(in-app-messaging): audit in-app messaging feature files for licenses

[calebpollman]

Description of changes

• add missing licenses in in-app messaging feature files

Issue #, if available

NA

Description of how you validated changes

NA

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[elorzafe]

LGTM 🌮

[codecov-commenter]

Codecov Report

Merging #9242 (eefd1d2) into in-app-messaging/main (91ef04d) will not change coverage.
The diff coverage is n/a.

@@                  Coverage Diff                   @@
##           in-app-messaging/main    #9242   +/-   ##
======================================================
  Coverage                  78.12%   78.12%           
======================================================
  Files                        250      250           
  Lines                      18176    18176           
  Branches                    3895     3895           
======================================================
  Hits                       14200    14200           
  Misses                      3846     3846           
  Partials                     130      130           

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