Fix: Crash when suspending & resuming App with active NativeAdView.

[ArthurMJ96]

Fix for

System.err: An uncaught Exception occurred on "main" thread.
System.err: Calling js method onStart failed
System.err: Error: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
System.err:

[triniwiz]

Thank you