Add express logs for several JobScheduler events.

Add express logs to track:
1. How apps interact with the updateEstimatedNetworkBytes() API
2. How apps interact with the updateTransferredNetworkBytes() API
3. How apps interact with the setNotification() API
4. How apps interact with the setEstimatedNetworkBytes() API
5. How apps interact with the setMinimumChunkBytes() API
6. How often apps hit the max scheduled job limit
7. How often apps are too slow in responding to JobService API calls
8. How many times apps crash (or otherwise unexpectedly lose their
   connection) while running a JobService
9. How many JobWorkItems apps enqueue at a time
10. Job execution concurrency

Bug: 138239687
Bug: 279935506
Test: atest CtsJobSchedulerTestCases:ConnectivityConstraintTest
Test: atest CtsJobSchedulerTestCases:JobSchedulingTest
Test: atest CtsJobSchedulerTestCases:NotificationTest
Test: atest FrameworksMockingServicesTests:JobNotificationCoordinatorTest
Change-Id: I153eef1120fcdbf64c241707287233c422fa66db