Add a snapshot of flutter/engine/src/build to our sdk

build/android/adb_kill_chrome_public

Index: build/android/adb_kill_chrome_public
diff --git a/build/android/adb_kill_chrome_public b/build/android/adb_kill_chrome_public
new file mode 100755
index 0000000000000000000000000000000000000000..5b539a043d4d910834f00c45b49112c89ec7bb17
--- /dev/null
+++ b/build/android/adb_kill_chrome_public
@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# 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.
+#
+# Kill a running instance of ChromePublic.
+#
+# Assumes you have sourced the build/android/envsetup.sh script.
+
+SHELL_PID_LINES=$(adb shell ps | grep -w 'org.chromium.chrome')
+VAL=$(echo "$SHELL_PID_LINES" | wc -l)
+if [ $VAL -lt 1 ] ; then
+   echo "Not running ChromePublic."
+else
+   SHELL_PID=$(echo $SHELL_PID_LINES | awk '{print $2}')
+   if [ "$SHELL_PID" != "" ] ; then
+      set -x
+      adb shell kill $SHELL_PID
+      set -
+   else
+     echo "ChromePublic does not appear to be running."
+   fi
+fi