Fixed bug in getTextRunCursor.

When auto-correction is used, the text is modified to underline the corrected word, which
modifies mGapLength and mGapStart. The mGapLength shift was not properly handled in getTextRunCursor.

Bug 2807595

Change-Id: I43ee216f6780270e452aa9199ffd892fe7ab6c3f
1 file changed