[android] Bring back OkHTTP

Update http_request_android.cpp for changes in #2727
Fix crash caused by calling both onFailure and onReponse in the same request
Fixes #2856
Fixes #2400

scripts/android/configure.sh

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 
 BOOST_VERSION=1.59.0
-LIBCURL_VERSION=7.45.0
-OPENSSL_VERSION=1.0.1p
 LIBPNG_VERSION=1.6.18
 JPEG_VERSION=v9a
 SQLITE_VERSION=3.9.1

scripts/android/defaults.mk

@@ -1,7 +1,7 @@
 HEADLESS ?= none
 PLATFORM ?= android
 ASSET ?= zip
-HTTP ?= curl
+HTTP ?= android
 CACHE ?= sqlite
 
 GYP_FLAVOR_SUFFIX=-android