Provide a default liboemcrypto called liboemstub for devices that do not have widevine OEM integration but still build the wv libs.

Change-Id: Iaa577416f3996677af234738ac0cd3344bbee9bc

proprietary/streamcontrol/lib/Android.mk

@@ -1,3 +1,5 @@
+ifeq ($(TARGET_ARCH),arm)
+
 LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
@@ -12,11 +14,4 @@ LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)
 OVERRIDE_BUILT_MODULE_PATH := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)
 include $(BUILD_PREBUILT)
 
-include $(CLEAR_VARS)
-LOCAL_MODULE := libwvocs
-LOCAL_SRC_FILES := \
-        libwvocs.a
-LOCAL_MODULE_TAGS := optional
-LOCAL_MODULE_SUFFIX := .a
-LOCAL_MODULE_CLASS := STATIC_LIBRARIES
-include $(BUILD_PREBUILT)
+endif