Refactor TextTrackPluginWrapper to include module definition and headers in source file

[bramoosterhuis]

Fix undefined reference to TextTrackClosedCaptionsStyleClient

TextTrackPluginWrapper.h defined MODULE_NAME as TextTrackClosedCaptionsStyleClient and
included <com/com.h> and <core/core.h>. This caused CallsignTLS<&TextTrackClosedCaptionsStyleClient>
to be instantiated in every translation unit that included the header. However TextTrackClosedCaptionsStyleClient
was never defined anywhere, resulting in an undefined reference at link time for any library linking
against libRialtoWrappers.

Changes

• Remove MODULE_NAME definition and Thunder includes from TextTrackPluginWrapper.h
• Move them to TextTrackPluginWrapper.cpp as the owning translation unit
• Add MODULE_NAME_ARCHIVE_DECLARATION to properly define TextTrackClosedCaptionsStyleClient

Why MODULE_NAME_ARCHIVE_DECLARATION

libRialtoWrappers is a static library — the archive variant is correct here as it omits the
shared library metadata registration that MODULE_NAME_DECLARATION adds.

Impact

Downstream packages linking against libRialtoWrappers were failing with
undefined reference to 'TextTrackClosedCaptionsStyleClient' at link time.
This fix resolves that.