Move python-adb from system/core/adb.

This really ought to be maintained as a separate project. Also adds a
setup.py for distribution.

Bug: http://b/22881740
Change-Id: I8e11e4154fac21d3196a533613822b236b2b73e6

python-packages/adb/__init__.py

@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from __future__ import absolute_import
+from .device import *  # pylint: disable=wildcard-import