tdf#86661 a11y: give ROLE_LABEL to read-only edit

ROLE_TEXT is for editable text, ROLE_LABEL should be used for static text,
so that screen readers know they should speak it.

Change-Id: I8f781a42a2838f641ccdfe7310046d74f9faced6
Reviewed-on: https://gerrit.libreoffice.org/50052Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

accessibility/source/standard/vclxaccessibleedit.cxx

@@ -218,6 +218,8 @@ sal_Int16 VCLXAccessibleEdit::getAccessibleRole(  )
     VclPtr< Edit > pEdit = GetAs< Edit >();
     if ( pEdit && ( ( pEdit->GetStyle() & WB_PASSWORD ) || pEdit->GetEchoChar() ) )
         nRole = AccessibleRole::PASSWORD_TEXT;
+    else if ( pEdit && ( pEdit->GetStyle() & WB_READONLY ) )
+        nRole = AccessibleRole::LABEL;
     else
         nRole = AccessibleRole::TEXT;