Location settings take effect only after reboot

[Evan Wang]

OTA8.5 hotfix image from rc channel and the latest image r199 from channel: ubuntu-touch/rc-proposed/bq-aquaris.en
$ system-image-cli -i
current build number: 38
device name: krillin
channel: ubuntu-touch/rc/bq-aquaris.en
last update: 2015-12-07 21:29:10
version version: 38
version ubuntu: 20151207.1
version device: 20150821-736d127
version custom: 20151111--36-46-vivid

Steps to reproduce:
1. Reboot device with location detection enabled from location indicator
2. Launch Here Maps or Google Maps
3. Make sure you can get a location fix
4. Disable location detection and the location option displayed as "Off" from System Settings-->Security & Privacy-->Location
5. Re-launch HERE Maps or Google Maps and switch to another place
6. Tap positioning, also can get a location fix, need to reboot device

The failures happen all the time when switch location detection from On to Off,
Sometimes, also happen when switch location from Off to On at present.

[Alberto Mardegan (mardy)]

Thanks Evan, I think this is a duplicate of bug 1524364.