Make public some IoUtils.closeQuietly.

Change-Id: I048beaeb2af3ff53341008207b89d228b3cfd7ab
Merge branch 'master' of https://github.com/koush/AndroidAsync

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/AndroidAsync:
  Make public some IoUtils.closeQuietly.