policy: Call method name should be SendDtmf rather than SendTone
The method on MMBaseCall is send_tone but the D-Bus method call is SendDtmf. Without this patch, calls return org.freedesktop.DBus.Error.AccessDenied.
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The method on MMBaseCall is send_tone but the D-Bus method call is SendDtmf. Without this patch, calls return org.freedesktop.DBus.Error.AccessDenied.