androidenv: Manually update missing packages

Improvement: Use nix-shell for fetch.sh

androidsdk{,_extras}:
- Update to 7.1.1

google_apis_25 is missing after fetch.sh due to an error in addon.xml
(upsteam bug).

Addons:
- Add google_apis_25
- Update google_play_services (v8_rc41 -> v11_rc16)

pkgs/development/mobile/androidenv/fetch.sh

@@ -1,4 +1,5 @@
-#!/bin/sh
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash --pure -p androidsdk curl libxslt
 
 # this shows a list of available xmls
 android list sdk | grep 'Parse XML:' | cut -f8- -d\  # | xargs -n 1 curl -O