- was a subtle regression introduced when fixing bug #5753006
- as we are now using SkPaint::kGlyphID_TextEncoding (glyph encoding)
instead of SkPaint::kUTF16_TextEncoding (UTF16 encoding), we need to
force the UTF16 encoding in some cases that are NOT going thru
the TextLayoutCache / Harfbuzz shaping
- fix also breakText() the same way
- also clean some old comment
- Warning: depends also on a CL from Skia for having getBaseGlyphCount() "const"
Change-Id: I3d1fc87f070884876c679b33541f810fbfb5df3f