Re-enable android bisect bot for Perf CQ jobs.

BUG=568661

Review URL: https://codereview.chromium.org/1641713003

Cr-Commit-Position: refs/heads/master@{#371830}

tools/perf/PRESUBMIT.py

@@ -125,8 +125,7 @@ def PostUploadHook(cl, change, output_api):
     'linux_perf_bisect',
     'mac_10_10_perf_bisect',
     'win_perf_bisect',
-    # crbug.com/568661, Disable android bots for CQ due to scheduled lab move.
-    # 'android_nexus5_perf_bisect'
+    'android_nexus5_perf_bisect'
   ]
   bots = ['tryserver.chromium.perf:%s' % s for s in bots]
   bots_string = ';'.join(bots)