Update TextShaper APIs to address API council feedback

This CL contains followings:
- Rename TextShaper to TextRunShaper, StyledTextShaper to TextShaper
- Renamed getTotalAdvance to getAdvance
- Rename getStyle to getGlyphStyle
- Rename getOriginX/Y to getOffsetX/Y
- Rename getPositionX/Y to getGlyphX/Y
- Fixed some documentation errors.
- Remvoed GlyphStyle. Added GlyphConsumer instead.

Bug: 170255480
Test: atest TextShaperRunTest GlyphStyleTest TextShaperTest

Change-Id: I0ffd7a3374e9cd1e04872240c2d0da26bc530244