Update Layout.Builder APIs

- Update documentation of
  setLineSpacingAmount/setLineSpacingMultipliser.
- Rename isIncludeFontPadding to isFontPaddingIncluded
- Fix bug of getRightIndents.

Bug: 297101305
Test: CtsTextTestCases
Change-Id: I81bf22cf0c034d7437a775ea96982da51d6ab569
2 files changed