Major UI Update, See Description

Complete Rework of the Lobby List
Expandable List View according to last Design Concept
Currently working with Mock Data:
ListParents Display GameName and Match Count. Expand Icon moved to the
left
ListChildren Display according to the the element type the right View
with filled data.
List Seperator uses also ElementType patterns.
ListViewElements get recycled.
Merge branch 'game' of https://github.com/ANDLABS-Git/studio-lounge-droid into game