Clean up strings.xml translation files
Do not unnecessarily export MozStumbler services
Update Android SDK tools to 22.6.1 and build tools to 19.0.3
MozStumbler v0.17.0
Update German translation
Update strings.xml
Introduce StumblerService.

The StumblerService runs in the application's process and
does not contain the notification / low battery bits.
Remove mLooper from the service.

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 sync adapter, this is no longer a concern.
Use a dedicated receiver for turn off intents.

This is so that mTurnOffReceiver doesn't leak while the app
is in the background.
wip Split reporter in two.

The current Reporter is responsible for syncing the scanner streams,
and actually formatting and uploading data. The first task will in
the future yield a StumblerBundle, which is broadcast by the library,
so that the application can take care of the second task.