[Bug fix] Fix bug case flickering on Oreo

[lfkdsk]

Google has confirmed it's a bug in Android 8.0, presumably fixed in 8.1. So the "empty animation" fix is for years, until minSdkVersion == 27.

1. create empty anim xml under /anim folder:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

</set>

2. replace 0 to animation_activity_none:

activity.overridePendingTransition(R.anim.animation_activity_none, R.anim.animation_activity_none);

Bug fix!

[ToLengSon]

你好，bug应该不仅仅在8.0的系统上吧，我这边按照你的方法还是会出现滑动返回RecycleView上移的问题

[lfkdsk]

@cyW0923 #14 #19 #29 three issues is about swipe back cause flickering. RecycleView move up may be related to cache the previous view of the activity? Like some issue's ToolBar moved up?