VR: Build VR Window Manager only on platforms supported by libgvr

Bug: None
Test: Verified build succeeds on aosp_mips-eng
lunch aosp_mips-eng
cd frameworks/native/services/vr/vr_window_manager
mma

Change-Id: Idf8c4cb842f5fd30f047e70fb1374bca6247eef9
diff --git a/services/vr/vr_window_manager/Android.mk b/services/vr/vr_window_manager/Android.mk
index 47d9dcc..85f8e1f 100644
--- a/services/vr/vr_window_manager/Android.mk
+++ b/services/vr/vr_window_manager/Android.mk
@@ -110,6 +110,7 @@
 LOCAL_LDLIBS := -llog
 LOCAL_MODULE := libvr_window_manager_jni
 LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_TARGET_ARCH := arm arm64 x86 x86_64
 LOCAL_MULTILIB := 64
 LOCAL_CXX_STL := libc++_static
 include $(BUILD_SHARED_LIBRARY)
@@ -126,6 +127,7 @@
 LOCAL_LDLIBS := -llog
 LOCAL_MODULE := vr_wm
 LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_TARGET_ARCH := arm arm64 x86 x86_64
 LOCAL_INIT_RC := vr_wm.rc
 include $(BUILD_EXECUTABLE)
 
@@ -147,6 +149,7 @@
 LOCAL_AAPT_FLAGS += --auto-add-overlay
 LOCAL_AAPT_FLAGS += --extra-packages com.google.vr.cardboard
 LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+LOCAL_MODULE_TARGET_ARCH := arm arm64 x86 x86_64
 include $(BUILD_PACKAGE)