Convert AsyncTask to IntentService

[yulin2]

Hi UltimateAndroid developers, I'm doing research on Android async programming, particularly on
AsyncTask and IntentService. AsyncTask can lead to memory leak and losing task result when GUI is recreated during task running (such as orientation change). This article describes the problems very well.

We discussed with some Android experts and they agree with this issue, and claim that AsyncTask can be considered only for short tasks (less than 1 second). However, using IntentService (or AsyncTaskLoader) can avoid such problems since their lifecycles are independent from Activity/Fragment.

In UltimateAndroid, the AsyncTasks are declared as non-static inner classes of Activity/Fragment. So the above issue can occur (especially for relatively long tasks).

I refactored 6 AsyncTasks in UltimateAndroid to IntentService (in 6 separate commits), with the help of a refactoring tool we developed. Do you think using IntentService should be better in some of these 6 scenario? Do you want to merge some commits in this pr? Thanks.

[cymcsg]

Thank you very much for giving such useful PR!
I think it's a good idea to use IntentService instead of AsyncTasks in some cases.

In fact,the UltimateAndroidNormal has been deprecated so I think you do not need to pay too much time on that and I think there are some bug in ProgressMenuItemActivity in your commit a847e2d .However I haven't read it clearly only do some test on it .Could you help me find if there were some bugs on that which cause the app crashes.

Thank you very much and I want no only merge these PR but also find a way to propagandize that.

[yulin2]

Oh, I don't know UltimateAndroidNormal is deprecated, so I change it instead of UltimateAndroidGradle. I found the same files are also in UltimateAndroidGradle, so you can apply the same conversions for UltimateAndroidGradle.

For ProgressMenuItemActivity, the receiver should be put in onCreateOptionsMenu. I commit this change in 0cb7d85 and now it works.

[cymcsg]

Thank you very much.I have merged the PR.I am hoping for your more contribution to the project.