Database: Reduce scope of the cache lock

We do not need to lock the cache when checking parameter.
This is no-op change that will help if there is any unseen deadlock. It
also just a good practice to not lock when we do not need it

Bug: 310837813
Test: atest DatabaseManagerTest | current test should still pass
Change-Id: Ifa029c35196bfe0da3daa83e3b229d9048e92518