Bitmaps: fix how bitmap load errors are cached.
Fix NRE that occurs when a errored out bitmap is retrieved from cache.
remove orientation spam

Change-Id: I3f3a5dd9d1ce7eb5ebf87d307823bf8f73153b60
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  remove orientation spam
  Bitmaps: fix how bitmap load errors are cached. Fix NRE that occurs when a errored out bitmap is retrieved from cache.