added crowns

Frontend/app/src/main/AndroidManifest.xml

Frontend/app/src/main/ic_launcher-playstore.png

.../src/main/java/com/example/mobileapp/MemberFragement.java

...p/src/main/java/com/example/mobileapp/MemberFragment.java

...va/com/example/mobileapp/Recycler_View_Adapter_Group.java

...ava/com/example/mobileapp/Recycler_View_Adapter_User.java

.../app/src/main/java/com/example/mobileapp/Single_Trip.java

...app/src/main/java/com/example/mobileapp/Start_Screen.java

...main/java/com/example/mobileapp/Trip_Overview_Screen.java

Frontend/app/src/main/res/drawable-hdpi/admin_crown.png

Frontend/app/src/main/res/drawable-hdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-mdpi/admin_crown.png

Frontend/app/src/main/res/drawable-mdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-xhdpi/admin_crown.png

Frontend/app/src/main/res/drawable-xhdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-xxhdpi/admin_crown.png

Frontend/app/src/main/res/drawable-xxhdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-xxxhdpi/admin_crown.png

...tend/app/src/main/res/drawable-xxxhdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable/bottom_border.xml