Add new Android JUnit Instrumentation Skip code to python script

build/android/pylib/instrumentation/instrumentation_parser.py

 # 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.
 
 import logging
 import re
 
 # http://developer.android.com/reference/android/test/InstrumentationTestRunner.html
 STATUS_CODE_START = 1
 STATUS_CODE_OK = 0
 STATUS_CODE_ERROR = -1
 STATUS_CODE_FAILURE = -2
 
+# AndroidJUnitRunner would status output -3 to indicate a test is skipped
+STATUS_CODE_SKIP = -3
+
 # http://developer.android.com/reference/android/app/Activity.html
 RESULT_CODE_OK = -1
 RESULT_CODE_CANCELED = 0
 
 _INSTR_LINE_RE = re.compile(r'^\s*INSTRUMENTATION_([A-Z_]+): (.*)$')
 
 
 class InstrumentationParser(object):
 
   def __init__(self, stream):
@@ skipping 63 matching lines @@
       may be None if no instrumentation result was found in the output.
 
     Raises:
       AssertionError if attempting to get the instrumentation result before
       exhausting |IterStatus| first.
     """
     assert self._bundle is not None, (
         'The IterStatus generator must be exhausted before reading the final'
         ' instrumentation result.')
     return self._code, self._bundle