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 am: 4a843ec4e4  -s ours
am: 53b3982a41

* commit '53b3982a41c3de2e18c2e3db89646cdaa1cab617':
  ensure /data/tombstones exists on all Android device. DO NOT MERGE