b6787f2ee5
We need to make sure we stay alive for the duration of a backup or (especially) restore operation. The existing Handler-based timing system was simply not properly functional, so it's been retooled to use a repeating alarm delivering a broastcast PendingIntent to our registered receiver. We acquire a partial wake lock in the broadcast receiver [i.e. while the Alarm Manager is holding one for the duration of broadcast delivery] and pass the wakelock object to the backup thread, which eventually releases it when it's finsihed operations. A similar pattern is used for the threads handling restore and clear.