[FileIndexScheduler] Postpone housekeeping tasks while on battery
Summary:
The index cleaner tasks may cause considerable disk and cpu load,
but can be run later with (almost) no loss of functionality.
Depends on D21539
Reviewers: Baloo, ngraham, astippich
Reviewed By: Baloo, ngraham
Subscribers: kde-frameworks-devel
Tags: Frameworks, Baloo
Differential Revision: https://phabricator.kde.org/D21540