[Android] Add a configurable environment for devil/. (RELAND 2)

build/android/devil/android/sdk/split_select.py

Index: build/android/devil/android/sdk/split_select.py
diff --git a/build/android/devil/android/sdk/split_select.py b/build/android/devil/android/sdk/split_select.py
index 47fcea3cea616c9cdad4d593489e3e3c612be011..b47a21f9fe00b59b10b0ead9297d330691b900c2 100644
--- a/build/android/devil/android/sdk/split_select.py
+++ b/build/android/devil/android/sdk/split_select.py
@@ -4,12 +4,14 @@
 
 """This module wraps Android's split-select tool."""
 
-import os
-
+from devil.android.sdk import build_tools
 from devil.utils import cmd_helper
-from pylib import constants
+from devil.utils import lazy
+
+
+_split_select_path = lazy.WeakConstant(
+    lambda: build_tools.GetPath('split-select'))
 
-_SPLIT_SELECT_PATH = os.path.join(constants.ANDROID_SDK_TOOLS, 'split-select')
 
 def _RunSplitSelectCmd(args):
   """Runs a split-select command.
@@ -20,7 +22,7 @@ def _RunSplitSelectCmd(args):
   Returns:
     The output of the command.
   """
-  cmd = [_SPLIT_SELECT_PATH] + args
+  cmd = [_split_select_path.read()] + args
   status, output = cmd_helper.GetCmdStatusAndOutput(cmd)
   if status != 0:
     raise Exception('Failed running command "%s" with output "%s".' %