Remove Widevine CDM Dependency on STLPort

* Replace an stlport static assert with a C++11 static_assert.
 * Move some libraries that were being built with the NDK but
   statically included into platform code off the NDK.
 * Rebuild the obfuscated binaries to use the new STL.
 * Remove MIPS support temporarily due to an inability to generate
   obfuscated binaries for it. (To be fixed in b/19482469.)

Bug: 15193147
Change-Id: Icc166583b0c6af68550baf17ab8c33076a1179d3

libwvdrmengine/test/unit/Android.mk

@@ -15,14 +15,13 @@ LOCAL_C_INCLUDES := \
   vendor/widevine/libwvdrmengine/oemcrypto/include \
 
 LOCAL_STATIC_LIBRARIES := \
-  libgtest_ndk \
-  libgtest_main_ndk \
+  libgtest \
+  libgtest_main \
 
 LOCAL_SHARED_LIBRARIES := \
   libcrypto \
   libdl \
   liblog \
-  libstlport \
   libutils \
   libwvdrmengine \
 
@@ -30,8 +29,6 @@ LOCAL_MODULE := libwvdrmengine_test
 
 LOCAL_MODULE_TAGS := tests
 
-LOCAL_MODULE_TARGET_ARCH := arm mips x86
-
-LOCAL_CXX_STL := stlport
+LOCAL_MODULE_TARGET_ARCH := arm x86
 
 include $(BUILD_EXECUTABLE)