Assume a texture is unbound after deleting it
Bug #9316260

The GL specification indicates that deleting a bound texture has
the side effect of binding the default texture (name=0). This change
replaces all calls to glDeleteTextures() by Caches::deleteTexture()
to properly keep track of texture bindings.

Change-Id: Ifbc60ef433e0f9776a668dd5bd5f0adbc65a77a0
diff --git a/libs/hwui/PathCache.cpp b/libs/hwui/PathCache.cpp
index 3f6485c..3ab40da 100644
--- a/libs/hwui/PathCache.cpp
+++ b/libs/hwui/PathCache.cpp
@@ -223,7 +223,7 @@
         }
 
         if (texture->id) {
-            glDeleteTextures(1, &texture->id);
+            Caches::getInstance().deleteTexture(texture->id);
         }
         delete texture;
     }