Merge "Revert "Revert "Revert "Add unit tests for java.nio.channels.FileChannel open methods"""" am: 4cb5ed81a8 am: 1d55304a8a am: 4f1ac64325
am: 0b68dc6f80

Change-Id: I5b3bc800a957b45d072f4984659e72d5a1b7e5fb