AVPlayerViewController's customInfoViewController can not be removed.

Number:rdar://48192193 Date Originated:2019.02.19
Status:Resolved Resolved:YES
Product:tvOS Product Version:12.0
Classification:Crash Reproducible:Always
I'd like to show customInfoViewController in some case, and another case to hide it. 

Steps to Reproduce: 
1. Add customInfoViewController to AVPlayerViewController. 
2. Set customInfoViewController = nil

Expected Results: Remove customInfoViewController from tab bar. 
Actual Results: Crash and show the message on console. *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0] (null) 

Version/Build: tvOS 12.0


Update to tvOS 13 beta 1 to fix this issue.

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