fota升级，launcher3 icon白边还在

这是因为fota升级之后，不会删除data分区，然后数据又都保存在/data/data/com.android.xxxxlauncher3

只要fota升级把/data/data/com.android.xxxxlauncher3数据删了就可以拉

https://blog.youkuaiyun.com/wkgoodboy2016/article/details/124634034

From c1410ded9160e25f1c9d85676e7a3666dce17af1 Mon Sep 17 00:00:00 2001
From: liupingzhang <liupingzhang@neostra.com>
Date: Wed, 23 Jan 2019 19:13:28 +0800
Subject: [PATCH] bootable/recovery: system update remove launcher3 databases
 for reload Workspace

---
 bootable/recovery/recovery.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)