camera2-portability: Add support for previews using the camera2 API

At the moment, only SurfaceTextures (and not SurfaceViews/SurfaceHolders) are
supported. The tests still only cover Stringifier and IntegralStringifier.

Change-Id: Ie643c58f8383cd3b9f59c16e0b79239df0ca068d
diff --git a/camera2/portability/portability.mk b/camera2/portability/portability.mk
new file mode 100644
index 0000000..a86c511
--- /dev/null
+++ b/camera2/portability/portability.mk
@@ -0,0 +1,23 @@
+# Copyright 2014 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.
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := android-ex-camera2-portability
+LOCAL_MODULE_TAGS := optional
+LOCAL_SDK_VERSION := current
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+include $(BUILD_STATIC_JAVA_LIBRARY)