Revert "Convert libwvdrmengine to soong."

This change introduced b/38487636 "Distorted video observed when
playing purchased/rented movie in Google play movies & TV app."

Before resubmitting an updated variant of the original CL, please
test playback with Play Movies and the GTS media tests. 

This reverts commit 33f9979b2b.

Change-Id: I4ec2e6fe81323e91e4b62288755c967999e81041

libwvdrmengine/cdm/Android.mk

@@ -0,0 +1,50 @@
+# ----------------------------------------------------------------
+# Builds libcdm.a
+#
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES := \
+    vendor/widevine/libwvdrmengine/cdm/core/include \
+    vendor/widevine/libwvdrmengine/cdm/metrics/include \
+    vendor/widevine/libwvdrmengine/cdm/include \
+    vendor/widevine/libwvdrmengine/oemcrypto/include \
+    vendor/widevine/libwvdrmengine/third_party/stringencoders/src
+
+LOCAL_C_INCLUDES += \
+    external/jsmn \
+    external/protobuf/src \
+
+LOCAL_STATIC_LIBRARIES := libcdm_protos libcrypto_static
+
+SRC_DIR := src
+CORE_SRC_DIR := core/src
+METRICS_SRC_DIR := metrics/src
+
+LOCAL_SRC_FILES := \
+    $(CORE_SRC_DIR)/buffer_reader.cpp \
+    $(CORE_SRC_DIR)/cdm_engine.cpp \
+    $(CORE_SRC_DIR)/cdm_session.cpp \
+    $(CORE_SRC_DIR)/certificate_provisioning.cpp \
+    $(CORE_SRC_DIR)/crypto_session.cpp \
+    $(CORE_SRC_DIR)/device_files.cpp \
+    $(CORE_SRC_DIR)/initialization_data.cpp \
+    $(CORE_SRC_DIR)/license.cpp \
+    $(CORE_SRC_DIR)/license_key_status.cpp \
+    $(CORE_SRC_DIR)/oemcrypto_adapter_dynamic.cpp \
+    $(CORE_SRC_DIR)/policy_engine.cpp \
+    $(CORE_SRC_DIR)/privacy_crypto_openssl.cpp \
+    $(CORE_SRC_DIR)/service_certificate.cpp \
+    $(CORE_SRC_DIR)/usage_table_header.cpp \
+    $(SRC_DIR)/wv_content_decryption_module.cpp \
+    $(METRICS_SRC_DIR)/distribution.cpp \
+    $(METRICS_SRC_DIR)/event_metric.cpp \
+    $(METRICS_SRC_DIR)/metrics_front_end.cpp \
+    $(METRICS_SRC_DIR)/metrics_group.cpp \
+    $(METRICS_SRC_DIR)/timer_metric.cpp \
+
+
+LOCAL_MODULE := libcdm
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_STATIC_LIBRARY)