profiles: anki: allow mpv and mplayer

Anki relies on mpv and mplayer for playing audio and video files.

If mpv is present in the system but not allowed in firejail then
Anki fails to start because mpv permissions won't allow for execution.

Fixes #6544.

etc/profile-a-l/anki.profile

@@ -7,7 +7,9 @@ include anki.local
 include globals.local
 
 noblacklist ${DOCUMENTS}
+noblacklist ${HOME}/.config/mpv
 noblacklist ${HOME}/.local/share/Anki2
+noblacklist ${HOME}/.mplayer
 
 # Allow python (blacklisted by disable-interpreters.inc)
 include allow-python2.inc
@@ -23,7 +25,9 @@ include disable-xdg.inc
 
 mkdir ${HOME}/.local/share/Anki2
 whitelist ${DOCUMENTS}
+whitelist ${HOME}/.config/mpv
 whitelist ${HOME}/.local/share/Anki2
+whitelist ${HOME}/.mplayer
 include whitelist-common.inc
 include whitelist-var-common.inc
 
@@ -46,7 +50,7 @@ protocol unix,inet,inet6
 seccomp !chroot
 
 disable-mnt
-private-bin anki,python*
+private-bin anki,mplayer,mpv,python*
 private-cache
 private-dev
 private-etc @tls-ca,@x11