Inconsistent calling of AppDelegate::applicationWillEnterForeground() on iOS vs Android

[jimrange]

On iOS and Mac, the method AppDelegate::applicationWillEnterForeground() is only called after a game resumes. Not on first launch.

But on Android, AppDelegate::applicationWillEnterForeground() is called after resuming AND on first launch.

This result in inconsistent behavior of games on different platforms, where the behavior can and should be consistent.

More info: http://discuss.cocos2d-x.org/t/applicationwillenterforeground-always-call/24418

[fmo080308]

Yup!
No problem on IOS but Android.
AppDelegate::applicationWillEnterForeground() will be called on first launch continuously (like an update method)

[jimrange]

Same as this bug: #14125

[minggo]

fixed in #16201