Fix compat issue with apps directly calling LoadedApk.makeApplication().

Unfortuantely, it seems apps may be calling makeApplication() directly,
in which case returning the cached instance would break their expectation.

So let's not return the cached instance for external callers.

Test: Launch the kr.go.kdca.coov-19 app
Fix: 222737976
Change-Id: Idd7d2873d71edad182a7877117745fe021e18a80