Fix bug #5175022 Easy mode in MeasuredText.setPara() is no more used

- use the real TextDirectionHeuristics constants
- make more formal that LayoutDirection should be resolved BEFORE TextDirection
- reset TextDirection if LayoutDirection is recomputed
- remove non used TextDirectionHeuristic.isRtl(CharSequence...)

Change-Id: I1d53a7e3ee324cfd27785bb4d715d93de8d9ff4d
5 files changed