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/Texture.cpp b/libs/hwui/Texture.cpp
index e06227c..7923ce7 100644
--- a/libs/hwui/Texture.cpp
+++ b/libs/hwui/Texture.cpp
@@ -76,5 +76,9 @@
     }
 }
 
+void Texture::deleteTexture() const {
+    mCaches.deleteTexture(id);
+}
+
 }; // namespace uirenderer
 }; // namespace android