Support Qt 5.14 on Android
Assets (QML files and icons) are no longer extracted into the file system,
but now are available in the android_rcc_bundle QRC file.
This is based on Francis' work mentioned in D26749, but slightly adjusted
to also fix icon loading as well.
Reviewed By: mart
Subscribers: apol, plasma-devel
Maniphest Tasks: T12520
Differential Revision: https://phabricator.kde.org/D27525