libese: initial commit

libese is a low level library for enabling embedded secure
element use from Java or embedded usecases.

This commit defines the client API, the hardware abstraction API,
and supplies functional implementation of the T=1 protocol (frequently
used as the wire protocol for SPI attached smart cards/eSEs).

Included in this is one hardware reference implementation using
a NXP PN80T developer board wired to a HiKey 6220.

Test: baseline unittests; manual run of the examples/ese_nxp_sample; use
of relay with hardware
Bug: 34193615

Change-Id: I98037793bc29b3730c5301ee9cd5e6cd7465117d
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..97af836
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,17 @@
+//
+// Copyright (C) 2017 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.
+//
+
+subdirs = ["libese", "libese-teq1", "libese-hw", "examples", "tools"]