Fix build on older APIs

+ remove Log.cpp from guest android-emu, use ALOGE instead

Change-Id: I56f33139999454a140cd2d1c28820bc4b40fe239
diff --git a/Android.mk b/Android.mk
index b14ab81..8d5dd67 100644
--- a/Android.mk
+++ b/Android.mk
@@ -98,7 +98,7 @@
     EMUGL_COMMON_CFLAGS += -DALOGV=LOGV
 endif
 
-ifeq ($(shell test $(PLATFORM_SDK_VERSION) -gt 23 && echo isApi24OrHigher),isApi24OrHigher)
+ifeq ($(shell test $(PLATFORM_SDK_VERSION) -gt 27 && echo isApi28OrHigher),isApi28OrHigher)
     BUILD_EMULATOR_VULKAN := true
     EMUGL_COMMON_CFLAGS += -DGOLDFISH_VULKAN
 endif