Update PingSyncSynchronizer logging

Now every line contains the accountId, so it's easier to
keep track of what is going on when you have multiple accounts.
Also, improve logging surrounding security hold. It was
behaving correctly, but the logging was alarming.
b/17889874

Change-Id: Id9bfa6e4227de3baf4b45843cda0881a0f53f0f8
3 files changed