[Android] Raise timeout and required devices for chrome_public_test_apk on L Phone.

testing/buildbot/chromium.android.json

 {
   "Android Cronet Builder": {
     "additional_compile_targets": [
       "cronet_package"
     ]
   },
   "Android N5X Swarm Builder": {
     "gtest_tests": [
       {
         "override_compile_targets": [
@@ skipping 2357 matching lines @@
           "can_use_on_swarming_builders": true,
           "cipd_packages": [
             {
               "cipd_package": "infra/tools/luci/logdog/butler/${platform}",
               "location": "bin",
               "revision": "git_revision:25755a2c316937ee44a6432163dc5e2f9c85cf58"
             }
           ],
           "dimension_sets": [
             {
-              "android_devices": "4",
+              "android_devices": "6",

[bpastene, 2017/01/13 17:41:31]

This bot runs on a pool of only two swarming bots. If both lose a couple
devices, this test will never get picked up. IMO, we should remove the
android_devices field for bots running on their own pools. That said, lgtm.

[jbudorick, 2017/01/13 17:43:06]

The alternative is having it get picked up and timing out (though it's not clear
that that will happen w/ 1800s vs 960s). Either way, we get an infra error, I
suppose.

               "device_os": "LMY48I",
               "device_type": "hammerhead"
             }
           ],
           "expiration": 10800,
-          "hard_timeout": 960,
+          "hard_timeout": 1800,
           "output_links": [
             {
               "link": [
                 "https://luci-logdog.appspot.com/v/?s",
                 "=android%2Fswarming%2Flogcats%2F",
                 "${TASK_ID}%2F%2B%2Funified_logcats"
               ],
               "name": "shard #${SHARD_INDEX} logcats"
             }
           ]
@@ skipping 1411 matching lines @@
       },
       {
         "test": "chrome_sync_shell_test_apk"
       },
       {
         "test": "content_shell_test_apk"
       }
     ]
   }
 }