Update conditions for updates without user action for Android U

-For Android U, updates without user action are permitted for apps
targeting API 31+
-Updated the conditions for SDK version check in PackageInstallerSession and associated
documentation in PackageInstaller.SesionParams

Bug: 265131695
Test: atest CtsSilentUpdateHostTestCases
Change-Id: I7167ab4f0a322c04096503afa3053a49fbbb30dc