Revert "Made LCStoreDB try to use a separate DB connection"

This commit broke `php tests/parserTests.php`.

This reverts commit 4c0871fa0ef99d0d38bcba8e09fce8ef55f791d9.

Bug: 69082
Change-Id: If0781f8f51681717a848ec359c7b8c70932ed72d
Merge "Revert "Made LCStoreDB try to use a separate DB connection""