Fix NPE when posting feedback with no connection.
Set both versionCode and versionName in crash logs.
Updated Android Annotations dependency version to work with the last one provide by maven-android-deployer.
DownloadFileTask: Support redirection across schemes (e.g. HTTPS to HTTP)

Android's HttpURLConnection does not redirect across schemes even if
set(Instance)FollowRedirects() is set to true, so add a manual fallback.