Compile specific parts of the Android build with -O2.

base/third_party/dynamic_annotations/BUILD.gn

 # Copyright (c) 2013 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.
 
 source_set("dynamic_annotations") {
   sources = [
     "dynamic_annotations.c",
     "dynamic_annotations.h",
     "../valgrind/valgrind.h",
   ]
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:optimize" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }