Do not kill process bound with WAIVE_PRIORITY / ALLOW_OOM_MANAGEMENT

...when it's cached & idle and in forced-app-standby mode, if the client
app is not cached.

Bug: 189598723
Test: atest FrameworksServicesTests:ActivityManagerTest
Test: atest FrameworksMockingServicesTests:AppStateTrackerTest
Test: Manual - make such bindings from non-cached app and verify it
Change-Id: I96e4160711cf3d29cb3fc810df505ca4dd6f8e89