Revert of [Android][Telemetry] Disable failing key_mobile_sites benchmarks.

tools/perf/benchmarks/smoothness.py

Index: tools/perf/benchmarks/smoothness.py
diff --git a/tools/perf/benchmarks/smoothness.py b/tools/perf/benchmarks/smoothness.py
index ef0b30698860e63f7037ead1e7647f5913b5bfc3..733eb121c073789b7da524dc4c050f701fd5b780 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -153,8 +153,7 @@
               possible_browser.platform.GetOSName() == 'win')
 
 
-@benchmark.Disabled('all') # crbug.com/702194
-#@benchmark.Enabled('android')
+@benchmark.Enabled('android')
 @benchmark.Owner(emails=['vmiura@chromium.org', 'tdresser@chromium.org'])
 class SmoothnessKeyMobileSites(_Smoothness):
   """Measures rendering statistics while scrolling down the key mobile sites.
@@ -277,8 +276,7 @@
             possible_browser.browser_type == 'reference')
 
 
-@benchmark.Disabled('all') # crbug.com/702194
-#@benchmark.Enabled('android')
+@benchmark.Enabled('android')
 @benchmark.Owner(emails=['tdresser@chromium.org', 'rbyers@chromium.org'])
 class SmoothnessSyncScrollKeyMobileSites(_Smoothness):
   """Measures rendering statistics for the key mobile sites with synchronous