Add double tap to maximize screen brightness
Summary:
For barcode scanning it's best to maximize the screen brightness. It's more useful on Android than on the desktop, but this implementation is useful for Plasma Mobile. I plan to add
support for Android later.
Test Plan: Double click on barcode, see screen getting brighter.
Reviewers: vkrause
Reviewed By: vkrause
Subscribers: kde-pim
Tags: KDE PIM, KDE Itinerary
Differential Revision: https://phabricator.kde.org/D17035