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

components/cronet/android/only_jni_exports.lst

Index: components/cronet/android/only_jni_exports.lst
diff --git a/components/cronet/android/only_jni_exports.lst b/components/cronet/android/only_jni_exports.lst
new file mode 100644
index 0000000000000000000000000000000000000000..322201c3eac9969ad5b06924be7087ef76fd3ebe
--- /dev/null
+++ b/components/cronet/android/only_jni_exports.lst
@@ -0,0 +1,10 @@
+# Copyright 2016 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.
+
+{
+  /* Make sure we don't export anything unneeded as it could cause conflicts
+     with symbols from embedders. */
+  global: JNI_OnLoad;
+  local: *;
+};