Minor fix to GN for vulkan android builds

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4155

Change-Id: Ib6a630bbdaf503ff44fbc699aaffdf13ee9c2b59
Reviewed-on: https://skia-review.googlesource.com/4155
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index d5a6ad0..dcc61dd 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -124,7 +124,7 @@
   libs = []
   lib_dirs = []
   if (skia_use_vulkan) {
-    if (skia_vulkan_sdk != "") {
+    if (skia_vulkan_sdk != "" && !is_android) {
       if (is_win) {
         include_dirs += [ "$skia_vulkan_sdk/Include/" ]
         lib_dirs += [ "$skia_vulkan_sdk/Bin" ]