Support self-explanatory icon for PLAY TONE command

ETSI TS 102 384 TC 27.22.4.5.3 fails because it is expected to display
the self-explanatory icon without the alpha identifier.

TextMessage propagates the self-explanatory option specified by PLAY
TONE command, but ToneDialog does not consider it. If the icon is self-
explanatory, it should replace the alpha identifer.

Bug: 30007740
Change-Id: I945f6456a519551c57115deb0a5335f8707bb8a4
1 file changed