In edit enfine of Writer application getTextAtIndex(LINE) returns always (-1,-1)
when cursor is at the end of text. This is wrong because an screen reader does
not report a text when cursor is placed at the end and a just written character.

Output from logging of java_uno_accessbridge when cursor is at the end of a text:
[text] Paragraph 4: getTextAtIndex(LINE,2) returns (-1,-1,)
[text] Paragraph 4: getCaretPosition() returns 2

Output from logging of java_uno_accessbridge when cursor is in the text:
[text] Paragraph 1: getTextAtIndex(LINE,11) returns (0,14,This is a text)
[text] Paragraph 1: getCaretPosition() returns 11