Small fixes as found in staging.

appengine/swarming/swarming_bot/api/platforms/android.py

Index: appengine/swarming/swarming_bot/api/platforms/android.py
diff --git a/appengine/swarming/swarming_bot/api/platforms/android.py b/appengine/swarming/swarming_bot/api/platforms/android.py
index 7c2b8bc8dde317771c1ff3a0df76f0df40dc6440..0d7911c8bb123637d7b8ccb2414239056570dae5 100644
--- a/appengine/swarming/swarming_bot/api/platforms/android.py
+++ b/appengine/swarming/swarming_bot/api/platforms/android.py
@@ -14,9 +14,18 @@ import os
 
 
 from adb import adb_commands_safe
+from adb import adb_protocol
+from adb import common
 from adb import high
 
 
+LEVEL = logging.WARNING
+adb_commands_safe._LOG.setLevel(LEVEL)
+adb_protocol._LOG.setLevel(LEVEL)
+common._LOG.setLevel(LEVEL)
+high._LOG.setLevel(LEVEL)
+
+
 def initialize(pub_key, priv_key):
   return high.Initialize(pub_key, priv_key)
 
@@ -29,3 +38,7 @@ def get_devices(bot):
 
 def close_devices(devices):
   return high.CloseDevices(devices)
+
+
+def kill_adb():
+  return adb_commands_safe.KillADB()