Update conditions for updates without user action for Android T

-For Android T, updates without user action are permitted for apps
targetting API 30+
-Updated the conditions for SDK version check in PackageInstallerSession  and associated
documentation in PackageInstaller.SesionParams

Bug: b/215349058

Test: atest com.android.tests.hostside.silentupdate.SilentUpdateHostsideTests
Change-Id: Iafd03b75ecf246a9651572becf6158316ecd8100