fdo#64003 - added rmi and snd to insert -> movie & sound list

RMI and SND files were already supported but were missing from the list of
movie & sound menu. Added these in alpha order

	modified:   avmedia/source/viewer/mediawindow.cxx

Change-Id: I3241f1cdd8972fb3da85e8e2bdd26b25f61a53ec
Reviewed-on: https://gerrit.libreoffice.org/3727Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>

avmedia/source/viewer/mediawindow.cxx

@@ -225,6 +225,8 @@ void MediaWindow::getMediaFilters( FilterNameVector& rFilterNameVector )
                                       "MPEG Video", "mpg;mpeg;mpv;mp4",
                                       "Ogg Audio", "ogg;oga;",
                                       "Ogg Video", "ogv;ogx;",
+                                      "RMI MIDI Audio", "rmi",
+                                      "SND (SouND) Audio", "snd",
                                       "Quicktime Video", "mov",
                                       "Vivo Video", "viv",
                                       "WAVE Audio", "wav",