[pm] fix nullable data dir in ApplicationInfo

After b/314207341 is fixed, the code path for generating ApplicationInfo after
"uninstall -k --user 0" and then "uninstall --user 10" has changed. The
reason is that we no longer keep the AndroidPackage object around for
this scenario. Update the nullableDataDir logic to reflect that.

Test: atest
android.content.pm.cts.PackageManagerShellCommandMultiUserTest#testNullableDataDirEnabled
BUG: 319383840

Change-Id: I2ca5b05f8e3c0776188b1b167bac56092aeb189d