Add types URL to Pezkuwi mainnet chain config

Points to pezkuwi.json for custom type definitions needed for
proper extrinsic encoding.

chains/v22/android/chains.json

@@ -54,6 +54,7 @@
       }
     ],
     "types": {
+      "url": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/master/chains/types/pezkuwi.json",
       "overridesCommon": false
     },
     "additional": {