Added HIDL based software implementation of gatekeeper

This patch adds a HIDL based software implementation of gatekeeper based
on libgatekeeper.

Also adds OWNER files to the vts test and default implementation
directories.

Test: Manually tested in emulator. Changing passwords and login worked.
      VtsHalGatekeeperV1_0TargetTest
      gatekeeper-software-device-unit-tests
Change-Id: I632aeb6677640c133ec1b79e72568840adbc0550
diff --git a/gatekeeper/1.0/software/tests/Android.bp b/gatekeeper/1.0/software/tests/Android.bp
new file mode 100644
index 0000000..3f0300d
--- /dev/null
+++ b/gatekeeper/1.0/software/tests/Android.bp
@@ -0,0 +1,34 @@
+//
+// 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.
+//
+
+cc_test {
+    name: "gatekeeper-software-device-unit-tests",
+
+    cflags: [
+        "-g",
+        "-Wall",
+        "-Werror",
+        "-Wno-missing-field-initializers",
+    ],
+    shared_libs: [
+        "libgatekeeper",
+        "libcrypto",
+        "libbase",
+    ],
+    static_libs: ["libscrypt_static"],
+
+    srcs: ["gatekeeper_test.cpp"],
+}