bugfix (Android)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26708 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
new Android icons and styles

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26710 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed some dead code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26711 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e