Throttle error messages about mismatched bucket

There is a mismatch in active UID versus standby bucket
for some system apps, especially gms. Exact reason
could be a race or some other initialization bug, but
the mismatch wtf message is spamming the logs and DropBox
resulting in potential DOSing of gms handling the drop
box entries.

Throttle back the number of wtf logs to one per job
until the issue is root-caused.

Bug: 177396523
Test: Manual flash and verify reduced logs
Change-Id: I7d8911e034f9467ac627437a966248426ee6a1c7

apex/jobscheduler/service/java/com/android/server/job/controllers/BackgroundJobsController.java

@@ -203,7 +203,7 @@ public final class BackgroundJobsController extends StateController {
             isActive = (activeState == KNOWN_ACTIVE);
         }
         if (isActive && jobStatus.getStandbyBucket() == NEVER_INDEX) {
-            Slog.wtf(TAG, "App " + packageName + " became active but still in NEVER bucket");
+            jobStatus.maybeLogBucketMismatch();
         }
         boolean didChange = jobStatus.setBackgroundNotRestrictedConstraintSatisfied(canRun);
         didChange |= jobStatus.setUidActive(isActive);

apex/jobscheduler/service/java/com/android/server/job/controllers/JobStatus.java

@@ -205,6 +205,11 @@ public final class JobStatus {
      */
     private int standbyBucket;
 
+    /**
+     * Whether we've logged an error due to standby bucket mismatch with active uid state.
+     */
+    private boolean mLoggedBucketMismatch;
+
     /**
      * Debugging: timestamp if we ever defer this job based on standby bucketing, this
      * is when we did so.
@@ -805,6 +810,18 @@ public final class JobStatus {
         }
 
         standbyBucket = newBucket;
+        mLoggedBucketMismatch = false;
+    }
+
+    /**
+     * Log a bucket mismatch if this is the first time for this job.
+     */
+    public void maybeLogBucketMismatch() {
+        if (!mLoggedBucketMismatch) {
+            Slog.wtf(TAG,
+                    "App " + getSourcePackageName() + " became active but still in NEVER bucket");
+            mLoggedBucketMismatch = true;
+        }
     }
 
     // Called only by the standby monitoring code