Merge "libcutils: reimplement system property functions with libbase." am: 95e79c63a4 am: 854b9898ae am: 10b59d4044 am: 6f75222685 am: 6d00a7dcd5

Change-Id: Ib1ce5b5fb61c4f7e01048af8b6d29efe0ef80335