fix #1484: catch oom exception on BitmapFactory.decodeResource
getWPImageSpanThumbnailFromFilePath could throw an OOM
Merge pull request #1485 from wordpress-mobile/issue/1484-oom-startimg

fix #1484: catch oom exception on BitmapFactory.decodeResource
2.9.1 version bump
Merge branch 'master' into develop