am 62d4395b: Merge change I6dc8a694 into eclair

Merge commit '62d4395bdb3114b9a75e46140456bc54fd13a3e7' into eclair-plus-aosp

* commit '62d4395bdb3114b9a75e46140456bc54fd13a3e7':
  Layoutlib: Add a constant for default density value.