Fix iOS background music for another app

[goinnn]

This commit solves two errors detected:

1. iPhone 7 - iOS 9 and iPhone 5S iOS9:

With app in background after play music on Spotify, youtube or call someone, the app no sound more in background.

2. iPhone 5S iOS9:

After run stop in background the app no sound more in background.

[aspdev91]

@goinnn Thanks for creating this. I tried testing this in iOS 13 and no sound is played at all upon preloadSimple though the background audio keeps playing.

Do you know how I can resolve this? I've been looking for a solution that allows me to play small sounds over the background music or iFrame and didn't come across anything that works right now.

[elcreator]

@aspdev91 preloadSimple can't play anything longer than 30s - it's platform limitation.