DiskLruCache: Add a way to commit ignoring whether the file was written.
This is kinda hacky. But Streams suck, and I needed a way to do this.

Change-Id: If3f1e9f27a4f1b6d1e1f01342999426542316ba8
Merge branch 'master' of https://github.com/koush/AndroidAsync

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/AndroidAsync:
  DiskLruCache: Add a way to commit ignoring whether the file was written. This is kinda hacky. But Streams suck, and I needed a way to do this.