Fenix: [Bug] Fenix Crashes while opening

[jawadalkassim]

Steps to reproduce

Launch fenix
the app crashes and force stop it self also go back to home screen
with a window to send crash data to mozilla

Expected behavior

Launch the browser without issues

Actual behavior

Crashes , can't open the browser

Device information

Huawei P8 lite 2017

• Android device:
  Android 8.0
• Fenix version:
  Nightly 190820 06.04

[Mugurell]

This happens because of a recent change from #4744

Caused by: java.lang.IllegalStateException: This ViewTreeObserver is not alive, call getViewTreeObserver() again
        at android.view.ViewTreeObserver.checkIsAlive(ViewTreeObserver.java:918)
        at android.view.ViewTreeObserver.removeOnPreDrawListener(ViewTreeObserver.java:645)
        at org.mozilla.fenix.home.TransitionPreDrawListener$onPreDraw$2.invoke(TransitionPreDrawListener.kt:43)
        at org.mozilla.fenix.home.TransitionPreDrawListener$onPreDraw$2.invoke(TransitionPreDrawListener.kt:16)
        at kotlinx.coroutines.InvokeOnCompletion.invoke(JobSupport.kt:1286)

Will work on a fix asap.

[jawadalkassim]

Sounds good, new nightly update
fix the issue