Create activityHandler.logger on main thread to avoid race condition
Create activityHandler.logger on main thread to avoid race condition

yutmr/ios_sdk,trademob/ios_sdk,BlueCrystalLabs/ios_sdk,Threadflip/adjust_ios_sdk,nicolas-brugneaux-sociomantic/ios_sdk,akolov/adjust,pitchtarget/adjust-ios-sdk,mseegers/ios_sdk,dannycxh/ios_sdk