Updating certain services to be final fields.

Certain services were removed from being final fields in ag/5932642.
This change essentially reverts the deletions of those final fields.

Bug: 122591875
Test: atest cts.tests.app.src.android.app.cts.ActivityManagerTest#testIsAppForegroundRemoved
Change-Id: I403d214b31c964ee5587c35260138e0af12fd11e