Android: Make incremental install work for two <instrumentation>

build/android/incremental_install/BUILD.gn

 # 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.
 
 import("//build/config/android/rules.gni")
 
 android_library("bootstrap_java") {
   # Use .dex rather than .dex.jar to be usable by package_apk().
   dex_path = "$target_gen_dir/bootstrap.dex"
   java_files = [
     "java/org/chromium/incrementalinstall/BootstrapApplication.java",
     "java/org/chromium/incrementalinstall/BootstrapInstrumentation.java",
     "java/org/chromium/incrementalinstall/ClassLoaderPatcher.java",
     "java/org/chromium/incrementalinstall/LockFile.java",
     "java/org/chromium/incrementalinstall/Reflect.java",
+    "java/org/chromium/incrementalinstall/SecondInstrumentation.java",
   ]
   emma_never_instrument = true
   run_findbugs_override = false
 }