More stats for meminfo

Added shared clean tracking (for pageable stuff).  Renamed .oat and .art mmap.

(cherry picked from commit 967d53b17b6010c3a675ca9c3bbd0e9dd2f2f092)

Change-Id: I741e0dbe0d3f9aee6975c6fad8af9905942962d4
4 files changed