psc: Add ContentProviderRecordInternal

This change introduces ContentProviderRecordInternal to abstract common
content provider record functionalities. Then it updates OomAdjuster and
OomAdjusterImpl to utilize the new ContentProviderRecordInternal
interface and its methods.

Bug: 425766486
Test: m services.core
Test: atest MockingOomAdjusterTests OomAdjusterTests
Test: atest FrameworksServicesTestsRavenwood_ProcessStateController
Flag: EXEMPT pure refactor

Change-Id: Id16fd6a3eb4f088345be55de633bdeb8b5500547