[Android] Better handle gtest crashes that generate pexpect.EOF.

build/android/pylib/android_commands.py

Index: build/android/pylib/android_commands.py
diff --git a/build/android/pylib/android_commands.py b/build/android/pylib/android_commands.py
index 55b3fd6c04e7e306d963dab4ca01070f77e3942f..67275a4d55c4e21cb572d6038191fd1ee9f6d688 100644
--- a/build/android/pylib/android_commands.py
+++ b/build/android/pylib/android_commands.py
@@ -215,6 +215,15 @@ class AndroidCommands(object):
     """Returns our AdbInterface to avoid us wrapping all its methods."""
     return self._adb
 
+  def IsOnline(self):
+    """Checks whether the device is online.
+
+    Returns:
+      True if device is in 'device' mode, False otherwise.
+    """
+    out = self._adb.SendCommand('get-state')
+    return out.strip() == 'device'
+
   def IsRootEnabled(self):
     """Checks if root is enabled on the device."""
     root_test_output = self.RunShellCommand('ls /root') or ['']