* aoc: Fixes some inconsistencies
This PR fixes an wrong returned value (introduced in #2414) which cause some DLC not recognized in some games like Super Robot War T.
Additionnally to that, I've removed the EventHandle check too, because it could cause some issues, but sadly it doesn't do the job so I reverted the changes. It should fix Diablo III: Eternal Collection.
* Fix loop
* Revert TitleLanguage change
* write only available ids
* aoc/am: Cleanup aoc service and stub am calls
This PR implement aoc call `GetAddOnContentListChangedEventWithProcessId` (Closes#2408) and `CreateContentsServiceManager`. Additionnally, a big cleanup (checked by RE on latest firmware) is made on the whole service. I've added `CountAddOnContent`, `ListAddOnContent` and `GetAddonContentBaseId` for games which require version `1.0.0-6.2.0` too.
Am service call `ReportUserIsActive` is stubbed (checked by RE, closes#2413).
Since some logic in the service (aoc) which handle the DLCs has been changed, it could be nice to have some testing to be sure there is no regression.
* Remove wrong check
* Addresses gdkchan feedback
* Fix GetAddOnContentLostErrorCode
* fix null pid in services
* Add missing comment
* remove leftover comment
