Add Max-Res Decode Engine to CDM Core

(This is a port of http://go/wvgerrit/11555 from the Widevine CDM
repo.)

Bug: 16034599
Change-Id: Ie69afac7d89e27623adbc84d2baebccf1d1ba6e6

libwvdrmengine/cdm/test/Android.mk

@@ -35,6 +35,10 @@ test_name := license_unittest
 test_src_dir := ../core/test
 include $(LOCAL_PATH)/unit-test.mk
 
+test_name := max_res_engine_unittest
+test_src_dir := ../core/test
+include $(LOCAL_PATH)/unit-test.mk
+
 test_name := policy_engine_unittest
 test_src_dir := ../core/test
 include $(LOCAL_PATH)/unit-test.mk