Update Compat Framework so all system uid apps are treated as targeting current sdk

Previously if there were some system uid apps targeting an older sdk, then all sytem uid-based compat framework checks would return behaviour of the older sdk.

Flag: com.android.server.compat.system_uid_target_system_sdk
Bug: 282922910
Change-Id: Ia92f3ac378c18edc45015a80103da87097bb5233