Use statsd constants instead of literals

Instead of writing StatsLog.write(StatsLog.NAME, 1), we replace the 1
with the appropriate StatsLog constant.

Bug: 72749863
Test: still compiles

Change-Id: I68c8206de49df7e77ee66333dd633e4b70c7b226
diff --git a/services/core/java/com/android/server/job/JobSchedulerService.java b/services/core/java/com/android/server/job/JobSchedulerService.java
index e0baeee..401c05e 100644
--- a/services/core/java/com/android/server/job/JobSchedulerService.java
+++ b/services/core/java/com/android/server/job/JobSchedulerService.java
@@ -862,7 +862,8 @@
             }
             startTrackingJobLocked(jobStatus, toCancel);
             StatsLog.write_non_chained(StatsLog.SCHEDULED_JOB_STATE_CHANGED,
-                    uId, null, jobStatus.getBatteryName(), 2);
+                    uId, null, jobStatus.getBatteryName(),
+                    StatsLog.SCHEDULED_JOB_STATE_CHANGED__STATE__SCHEDULED);
 
             // If the job is immediately ready to run, then we can just immediately
             // put it in the pending list and try to schedule it.  This is especially