Update the UI for the scanner fragment

See merge request !27

- Add a modal message for 0 devices showing
- Show the state of the connection next to every device

New 'scanning' screen, which shows when 0 devices are seen:
https://i.imgur.com/qgkox1A.jpg

Status indicators for each device:
https://i.imgur.com/dUI0iCq.jpg
(either 'NOT BONDED', 'BONDING...' or 'BONDED', The lattermost is bold and has green text)

Sort app list alphabetically

Closes #19

See merge request !26

Mood2personal state

See merge request !23

Deal with lint error

See merge request !14

Merge branch 'mood2personalState' of git.card10.badge.events.ccc.de:card10/companion-app-android into mood2personalState

Fix BLE callback issues

See merge request !25

RFC:Navigation

See merge request card10/companion-app-android!13

ble: card10 svc - add enum for personal state

See merge request card10/companion-app-android!22

Make main menu scrollable

See merge request card10/companion-app-android!24

LowEffortService: Filter for relevant characteristic.

See merge request !21

Share one connection

See merge request card10/companion-app-android!19