Support lists of files in adb.AndroidDevice.push.

Bug: http://b/166155032
Test: system/core/adb/test_device.py
Change-Id: I7a6514070b5bbb379f2652053de64a7603e988ae

python-packages/adb/device.py

@@ -435,7 +435,13 @@ class AndroidDevice(object):
         cmd = ['push']
         if sync:
             cmd.append('--sync')
+
+        if isinstance(local, str):
             cmd.extend([local, remote])
+        else:
+            cmd.extend(local)
+            cmd.append(remote)
+
         return self._simple_call(cmd)
 
     def pull(self, remote, local):