[Android] Remove org.apache.http from proguard flags and gn.

chrome/test/android/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
 
 android_library("chrome_java_test_support") {
   testonly = true
   java_files = [
     "javatests/src/org/chromium/chrome/test/BottomSheetTestCaseBase.java",
@@ skipping 69 matching lines @@
     "//content/public/android:content_java",
     "//content/public/test/android:content_java_test_support",
     "//net/android:net_java",
     "//net/android:net_java_test_support",
     "//testing/android/reporter:reporter_java",
     "//third_party/android_support_test_runner:runner_java",
     "//third_party/android_tools:android_support_design_java",
     "//third_party/android_tools:android_support_transition_java",
     "//third_party/android_tools:android_support_v7_appcompat_java",
     "//third_party/android_tools:android_support_v7_recyclerview_java",
-    "//third_party/android_tools:legacy_http_javalib",
     "//third_party/jsr-305:jsr_305_javalib",
     "//third_party/junit",
     "//ui/android:ui_java",
     google_play_services_library,
   ]
 }