restart failure for the checkState initialization issue

[ElvisYzz]

Summary of Bug

In the recent update of cosmos, the initialization of checkState is moved from initFromStore to InitChain. So every time we restart the app, the checkState is not initialized because InitChain only executed when the app first starts, which results in the failure if use checkState in beginBlocker/endBlocker.

Steps to Reproduce

1. add a customized endBlocker that would use checkState, for instance,

lastBlockTime := app.checkState.ctx.BlockHeader().Time

2. start the app
3. stop it
4. start again

[AdityaSripal]

This is already fixed in #1800

[AdityaSripal]

Closed #1816 via #1800