Add unit tests for AIDL service

[ Merged from http://go/wvgerrit/150029 ]

Test: m libwvdrmengine_hal_test -j128
Test: m libwvdrmengine_hal_test WV_UNITTESTS_BUILD_TARGET=hidl -j128
Test: adb push $(OUT)/data/nativetest/libwvdrmengine_hal_test /data/nativetest/.
Test: adb shell  LD_LIBRARY_PATH=/vendor/lib64 /data/nativetest/libwvdrmengine_hal_test

Bug: 217247987
Change-Id: Ib4f22c976b8ae6c2983cb611a958ddc3a29aebdb

libwvdrmengine/test/unit/Android.mk

@@ -5,10 +5,12 @@ LOCAL_PATH:= $(call my-dir)
 #
 include $(CLEAR_VARS)
 
+WV_UNITTESTS_BUILD_TARGET?=
+ifeq ($(WV_UNITTESTS_BUILD_TARGET), hidl)
 LOCAL_SRC_FILES := \
-  WVCreatePluginFactories_test.cpp \
-  WVCryptoFactory_test.cpp \
-  WVDrmFactory_test.cpp \
+  hidl/WVCreatePluginFactories_test.cpp \
+  hidl/WVCryptoFactory_test.cpp \
+  hidl/WVDrmFactory_test.cpp \
 
 LOCAL_C_INCLUDES := \
   frameworks/av/include \
@@ -40,7 +42,44 @@ LOCAL_SHARED_LIBRARIES := \
 LOCAL_HEADER_LIBRARIES := \
   libstagefright_foundation_headers \
 
+# build unit tests for Aidl
+else
+
+LOCAL_SRC_FILES := \
+  WVCreatePluginFactories_hal_test.cpp \
+  WVCryptoFactory_hal_test.cpp \
+  WVDrmFactory_hal_test.cpp \
+
+LOCAL_C_INCLUDES := \
+  frameworks/av/include \
+  frameworks/native/include \
+  vendor/widevine/libwvdrmengine/aidl_include \
+  vendor/widevine/libwvdrmengine/include \
+  vendor/widevine/libwvdrmengine/mediadrm/aidl_include \
+  vendor/widevine/libwvdrmengine/oemcrypto/include \
+
+LOCAL_STATIC_LIBRARIES := \
+  libgtest \
+  libgtest_main \
+
+LOCAL_SHARED_LIBRARIES := \
+  android.hardware.drm-V1-ndk \
+  libbase \
+  libbinder_ndk \
+  libcrypto \
+  libdl \
+  liblog \
+  libutils \
+  libwvaidl \
+
+LOCAL_HEADER_LIBRARIES := \
+  libstagefright_foundation_headers \
+
+# endif $(WV_UNITTESTS_BUILD_TARGET)
+endif
+
 LOCAL_MODULE := libwvdrmengine_hal_test
+
 LOCAL_LICENSE_KINDS := legacy_by_exception_only
 LOCAL_LICENSE_CONDITIONS := by_exception_only