[Android] Tune DeviceUtils commands that are prone to large outputs.

build/android/pylib/device/device_errors.py

Index: build/android/pylib/device/device_errors.py
diff --git a/build/android/pylib/device/device_errors.py b/build/android/pylib/device/device_errors.py
index 66a226ca5206e590c66732192b03ce4af8a95368..e94968f146ad3256edbaa67460b79cdf410ee33f 100644
--- a/build/android/pylib/device/device_errors.py
+++ b/build/android/pylib/device/device_errors.py
@@ -59,7 +59,11 @@ class AdbShellCommandFailedError(AdbCommandFailedError):
     message.append('  exit status: %s\n' % status)
     if output:
       message.append('  output:\n')
-      message.extend('  - %s\n' % line for line in output.splitlines())
+      if isinstance(output, basestring):
+        output_lines = output.splitlines()
+      else:
+        output_lines = output
+      message.extend('  - %s\n' % line for line in output_lines)
     else:
       message.append("  output: ''\n")
     message = ''.join(message)