Change scheduling logic to run network jobs sooner

BUG: 24385082
BUG: 23144425
BUG: 18117279

Run jobs with connectivity constraints as soon as the developer-allotted
delay has expired, rather than waiting for the override deadline. This
is more in tune with what developers expect, although it reduces the
amount of batching the scheduler can theoretically do.
This will also have the side effect of fixing several failing cts
tests that started breaking b/c the signal to 'run connectivity
jobs early' was removed in M and nothing was put in to replace it.

Change-Id: I7e63c2b62f2882ee906f748445bbf10c32e19c5f

services/core/java/com/android/server/job/JobSchedulerService.java

@@ -73,7 +73,7 @@ import com.android.server.job.controllers.TimeController;
  */
 public class JobSchedulerService extends com.android.server.SystemService
         implements StateChangedListener, JobCompletedListener {
-    static final boolean DEBUG = false;
+    public static final boolean DEBUG = false;
     /** The number of concurrent jobs we run at one time. */
     private static final int MAX_JOB_CONTEXTS_COUNT
             = ActivityManager.isLowRamDeviceStatic() ? 1 : 3;
@@ -99,7 +99,7 @@ public class JobSchedulerService extends com.android.server.SystemService
      * Minimum # of connectivity jobs that must be ready in order to force the JMS to schedule
      * things early.
      */
-    static final int MIN_CONNECTIVITY_COUNT = 2;
+    static final int MIN_CONNECTIVITY_COUNT = 1;  // Run connectivity jobs as soon as ready.
     /**
      * Minimum # of jobs (with no particular constraints) for which the JMS will be happy running
      * some work early.