Add some OWNERS to CachedAppOptimizer file

This will simplify reviews as multiple folks develop on this file
but are not yet owners.

Test: NA
Bug: 264896530
Change-Id: I07c4543c947c3e240416f26a8a3cdbe6c728dfd7

PERFORMANCE_OWNERS

+timmurray@google.com
+edgararriaga@google.com
+dualli@google.com
+carmenjackson@google.com
+philipcuadra@google.com

services/core/java/com/android/server/am/OWNERS

@@ -38,6 +38,8 @@ per-file CarUserSwitchingDialog.java = file:platform/packages/services/Car:/OWNE
 
 per-file ContentProviderHelper.java = varunshah@google.com, omakoto@google.com, jsharkey@google.com, yamasani@google.com
 
+per-file CachedAppOptimizer.java = file:/PERFORMANCE_OWNERS
+
 # Multiuser
 per-file User* = file:/MULTIUSER_OWNERS