Adds --skip-clear-data flag to android's test_runner.py

build/config/android/internal_rules.gni

 # 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/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/zip.gni")
 import("//third_party/ijar/ijar.gni")
 
 assert(is_android)
@@ skipping 2033 matching lines @@
     }
     if (defined(invoker.incremental_install) && invoker.incremental_install) {
       test_runner_args += [ "--incremental-install" ]
 
       # These can still be overridden, but make more better defaults during
       # development.
       test_runner_args += [
         "--enable-device-cache",
         "--extract-test-list-from-filter",
         "--num_retries=0",
+        "--skip-clear-data",  # Clearing wipes optimized dex files.
       ]
     }
     if (is_asan) {
       test_runner_args += [ "--tool=asan" ]
     }
 
     generated_script = "$root_build_dir/bin/run_${_test_name}"
     outputs = [
       depfile,
       generated_script,
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--script-output-path",
       rebase_path(generated_script, root_build_dir),
     ]
     args += test_runner_args
   }
 }