Replace hidden APIs with their publicly avaiable variants

In order to make PackageInstaller an updatable app, we need to migrate
it away from any hidden APIs and have it depend only on publicly
available APIs or SystemApis.

Test: atest CtsPackageInstallTestCases
Bug: 239722738
Change-Id: Ia9a9ae03ff81fed441fba2d662b1a671cf7b369e