[Android] Fix environment variable handling in devil_env.

build/android/adb_command_line.py

Index: build/android/adb_command_line.py
diff --git a/build/android/adb_command_line.py b/build/android/adb_command_line.py
index fa3a82b26a5a50ea3b2c6543bb232c8274216901..ee2c4f9a912dc464c155d7a95892e1c3c84d3212 100755
--- a/build/android/adb_command_line.py
+++ b/build/android/adb_command_line.py
@@ -8,6 +8,7 @@
 import argparse
 import sys
 
+import devil_chromium
 from devil.android import device_utils
 from devil.android import device_errors
 from devil.utils import cmd_helper
@@ -28,6 +29,8 @@ Otherwise: Writes command-line file.
                       help='Remote path to flags file.')
   args, remote_args = parser.parse_known_args()
 
+  devil_chromium.Initialize()
+
   as_root = not args.device_path.startswith('/data/local/tmp/')
 
   if args.device: