am: Migrate updateAppUidRecLSP() to use ProcessRecordInternal

This CL refactors `updateAppUidRecLSP` method to use
`ProcessRecordInternal`. To achieve that, it introduces abstract
getPackageName() and isInstantApp() methods to ProcessRecordInternal.

Bug: 441412109
Test: m services.core
Test: atest MockingOomAdjusterTests OomAdjusterTests
Test: atest FrameworksServicesTestsRavenwood_ProcessStateController
Flag: EXEMPT PURE_REFACTOR

Change-Id: I697921ca9baec7eeafd097cad39dc7834fcedb03