Perform user restriction check before creating install session

If a user is restricted with DISALLOW_INSTALL_APPS restriction,
PackageInstallerSession throws a SecurityException causing PIA to crash.
Perform restriction checks before PIA creates an install session

Test: atest CtsPackageInstallTestCases:UserRestrictionInstallTest
Bug: 280441684
Change-Id: I9e6b9a0e56eea122b17b4e75a5496d158b15eefe