to solve this problem (Cannot find gtk2 used by Gtk2CellRenderer of package LCL.)
you need do next steps:
1) open your project In Lazarus IDE
2) In Lazarus IDE go to "Project Options (Shift+Ctrl+F11)"
3) In "Compiler Options" open tab "Additions and Overrides"
4) in right click on field "Set LCLWidgetType" and select Value "customdrawn", - this need for compile android application
thats all )