Establish owners for the AnrTimer feature

Assign ownership to the AnrTimer files in the java source, java unit
test, and jni directories.

Bug: 282428924

Test: none - OWNERS only

Change-Id: I208296bc0cf8369d59ef51c620f50939f843173d
diff --git a/PERFORMANCE_OWNERS b/PERFORMANCE_OWNERS
index 9452ea3..48a0201 100644
--- a/PERFORMANCE_OWNERS
+++ b/PERFORMANCE_OWNERS
@@ -3,3 +3,6 @@
 dualli@google.com
 carmenjackson@google.com
 philipcuadra@google.com
+shayba@google.com
+jdduke@google.com
+shombert@google.com