Add new API to allow applications to specify the line break word style. The line break style is one of the locale extension. When the line break style is set, it will be brought to ICU for calculation.
Bug: 183780874
Test: atest minikin_tests; atest TextViewTest; atest MeasuredTextTest; atest PrecomputedTextTest
Change-Id: Ia9cdb5b83e346f96ae22abbb1bcce05c43207bba