stop using (deprecated) SkBitmap::Config

Change-Id: Ic75b5fc6996578e9d95bd3a220439ec1541d7c3b
diff --git a/libs/hwui/TextureCache.cpp b/libs/hwui/TextureCache.cpp
index 1001cae0..9212d0a 100644
--- a/libs/hwui/TextureCache.cpp
+++ b/libs/hwui/TextureCache.cpp
@@ -333,8 +333,7 @@
 void TextureCache::uploadLoFiTexture(bool resize, const SkBitmap* bitmap,
         uint32_t width, uint32_t height) {
     SkBitmap rgbaBitmap;
-    rgbaBitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height, 0, bitmap->alphaType());
-    rgbaBitmap.allocPixels();
+    rgbaBitmap.allocPixels(SkImageInfo::MakeN32(width, height, bitmap->alphaType()));
     rgbaBitmap.eraseColor(0);
 
     SkCanvas canvas(rgbaBitmap);