Add CFP for droidcon-london-2025

Author: zsmb13

_conferences/droidcon-london-2025.md

@@ -5,4 +5,9 @@ location: London, UK
 
 date_start: 2025-10-30
 date_end:   2025-10-31
+
+cfp:
+  start: 2025-04-09
+  end:   2025-08-15
+  site:  https://sessionize.com/droidcon-london-2025
 ---