Three hyphenation frequencies are now supported:
kHyphenationFrequency_None, which turns off both automatic
hyphenation and soft hyphens.
kHyphenationFrequency_Normal, which has aconservative amount of
hyphenation useful as a conservative default.
kHyphenationFrequency_Full, which has a typographic-quality amount of
hyphenation useful for running text and tight screens.
Bug: 21038249
Change-Id: I2800f718c887c9389a1a059d7ec07d7fa2ca1dee
e92a3c62b5