Add ANR internal stop reason.

Bug: 258236856
Bug: 261999509
Test: atest CtsJobSchedulerTestCases
Change-Id: I589ffff0e3df9b7f22e875265c04ae0c0324dcef
diff --git a/stats/enums/app/job/enums.proto b/stats/enums/app/job/enums.proto
index 7104bb3..518f053 100644
--- a/stats/enums/app/job/enums.proto
+++ b/stats/enums/app/job/enums.proto
@@ -40,6 +40,7 @@
     INTERNAL_STOP_REASON_RTC_UPDATED = 9;
     INTERNAL_STOP_REASON_SUCCESSFUL_FINISH = 10;
     INTERNAL_STOP_REASON_USER_UI_STOP = 11;
+    INTERNAL_STOP_REASON_ANR = 12;
 }
 
 // Public stop reasons returned through JobParameters.getStopReason()