Restore tray UI animation transitions

[keianhzo]

Configuration

Firefox Reality version: 6
Firefox Reality build ID:

Hardware: All

Steps to Reproduce

1. Click on the history tray button
2. Click on the Bookmarks tray button

Current Behavior

The history button is still in active state

Expected Behavior

History button should be in normal state

Possible Solution

We have temporarily removed the animations for tray buttons as there seems to be an android bug while combining XML transition animations and setting the View background programmatically. Further investigation is required.

Context

Error Logs and Stack Traces

[keianhzo]

This seems to be an Android bug, it'll require and undefined amount of research time to get this fix.