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

testing/buildbot/chromium.android.json

Index: testing/buildbot/chromium.android.json
diff --git a/testing/buildbot/chromium.android.json b/testing/buildbot/chromium.android.json
index 9c4668eec34cc4ef3ba7e4a541a08bfec7104912..a4b29bd1835c2f0af9917ccab4c4d40ff790b764 100644
--- a/testing/buildbot/chromium.android.json
+++ b/testing/buildbot/chromium.android.json
@@ -2375,13 +2375,13 @@
           ],
           "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": [