- Support streaming of content without .wvm extension.

If the .wvm extension is not present, the file header
  is parsed to determine if it is Widevine content.
- Fixed a missing call to OpenSession.
- Fixed unit test build.
- Fixed x86-eng build.
Change-Id: Ie6a81ce5e323c56d10cb5306453bff27f0feefd1

proprietary/streamcontrol/lib/Android.mk

@@ -1,5 +1,4 @@
 LOCAL_PATH:= $(call my-dir)
-ifeq ($(TARGET_ARCH),arm)
 
 include $(CLEAR_VARS)
 
@@ -12,5 +11,3 @@ LOCAL_MODULE_CLASS := SHARED_LIBRARIES
 LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)
 OVERRIDE_BUILT_MODULE_PATH := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)
 include $(BUILD_PREBUILT)
-
-endif