[PM] Get the installer title via createPackageContextAsUser

The different users may have different languages, use the
createPackageContextAsUser to consider the locale configurations.

Bug: 333975672
Test: atest CtsPackageManagerTestCases
Test: atest CtsPackageUninstallTestCases:ArchiveTest
Test: atest PackageArchiverTest
Change-Id: I9fdee245a0c9ab46f6ad7f305817215aeccc8cc0