ensure /data/tombstones exists on all Android device. DO NOT MERGE am: 9c0ed66313 am: c61a896f20  -s ours am: d61ebb0851 am: 75ccd732f3  -s ours am: 505a431468 am: b760e61686  -s ours am: d5cb8b417b am: 77dd50b470
am: 89c789ae47

* commit '89c789ae47031eb6bde161991005f7a6e8198556':
  ensure /data/tombstones exists on all Android device. DO NOT MERGE