re-enable startup benchmarks on Android

tools/perf/benchmarks/startup.py

 # Copyright 2013 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 measurements import startup
 import page_sets
 from telemetry import benchmark
 
 
-@benchmark.Disabled('android', 'snowleopard') # crbug.com/336913
+@benchmark.Enabled('has tabs')
+@benchmark.Disabled('snowleopard') # crbug.com/336913
 class StartupColdBlankPage(benchmark.Benchmark):
   tag = 'cold'
   test = startup.Startup
   page_set = page_sets.BlankPageSet
   options = {'cold': True,
              'pageset_repeat': 5}
 
 
 @benchmark.Enabled('has tabs')
 class StartupWarmBlankPage(benchmark.Benchmark):
@@ skipping 35 matching lines @@
 
 
 @benchmark.Disabled('android')
 class StartupWarmManyExtensions(benchmark.Benchmark):
   tag = 'many_extensions_warm'
   test = startup.Startup
   page_set = page_sets.BlankPageSet
   generated_profile_archive = 'many_extensions_profile.zip'
   options = {'warm': True,
              'pageset_repeat': 20}