Remove mLooper from the service and the handler from the Reporter.

It looks like the only reason why it was being used was so that
date synchronization could happen in a separate thread. Ever since
we started using a content provider + sync adapter, this is no longer
a concern.
Remove alarm.

This doesn't seem to have any effect on process priority (which
is actually controled by setForeground) or service restart after
being killed (which is controlled by the START_STICKY flag on
service start).
Merge pull request #575 from guilherme-pg/old-code-removal

Remove obsolete looper and alarm (@guilherme-pg)