Reland of Android: Use linker script to hide all non-JNI symbols

testing/test.gni

 # Copyright 2015 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.
 
 # ==============================================================================
 # TEST SETUP
 # ==============================================================================
 
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 41 matching lines @@
         data_deps = []
         forward_variables_from(invoker,
                                "*",
                                _wrapper_script_vars + [ "extra_dist_files" ])
         testonly = true
 
         # Thanks to the set_defaults() for test(), configs are initialized with
         # the default shared_library configs rather than executable configs.
         configs -= [
           "//build/config:shared_library_config",
-          "//build/config/android:hide_native_jni_exports",
+          "//build/config/android:hide_all_but_jni_onload",
         ]
         configs += [ "//build/config:executable_config" ]
 
         # Don't output to the root or else conflict with the group() below.
         output_name = rebase_path(_exec_output, root_out_dir)
         if (is_component_build || is_asan) {
           data_deps += [ "//build/android:cpplib_stripped" ]
         }
       }
 
@@ skipping 233 matching lines @@
 }
 
 # Test defaults.
 set_defaults("test") {
   if (is_android) {
     configs = default_shared_library_configs
   } else {
     configs = default_executable_configs
   }
 }