[telemetry] Disable system health key mobile sites benchmark on Android

tools/perf/benchmarks/system_health.py

 # Copyright 2016 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.
 
 from core import perf_benchmark
+from telemetry import benchmark
 from telemetry.timeline import tracing_category_filter
 from telemetry.web_perf import timeline_based_measurement
 import page_sets
 
 class _SystemHealthBenchmark(perf_benchmark.PerfBenchmark):
   TRACING_CATEGORIES = [
     'benchmark',
     'navigation',
     'blink.user_timing',
   ]
@@ skipping 13 matching lines @@
     return browser.platform.GetDeviceTypeName() == galaxy_s5_type_name
 
 
 class SystemHealthTop25(_SystemHealthBenchmark):
   page_set = page_sets.Top25PageSet
 
   @classmethod
   def Name(cls):
     return 'system_health.top25'
 
-
+# crbug.com/601953
+@benchmark.Disabled('android')
 class SystemHealthKeyMobileSites(_SystemHealthBenchmark):
   page_set = page_sets.KeyMobileSitesPageSet
 
   @classmethod
   def Name(cls):
     return 'system_health.key_mobile_sites'