RFR: 8285445: cannot open file "NUL:"

[Brian Burkhalter]

Change the default value of the `jdk.io.File.enableADS` property to `true`.

-------------

Commit messages:
 - 8285445: cannot open file "NUL:"

Changes: https://git.openjdk.java.net/jdk/pull/8373/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8373&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285445
  Stats: 57 lines in 2 files changed: 52 ins; 1 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8373.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8373/head:pull/8373

PR: https://git.openjdk.java.net/jdk/pull/8373