Introduce Caches::bindTexture() to reduce glBindTexture calls

Change-Id: Ic345422567c020c0a9035ff51dcf2ae2a1fc59f4
diff --git a/libs/hwui/LayerRenderer.cpp b/libs/hwui/LayerRenderer.cpp
index 3e55fff..987daae 100644
--- a/libs/hwui/LayerRenderer.cpp
+++ b/libs/hwui/LayerRenderer.cpp
@@ -436,7 +436,7 @@
         if ((error = glGetError()) != GL_NO_ERROR) goto error;
 
         caches.activeTexture(0);
-        glBindTexture(GL_TEXTURE_2D, texture);
+        caches.bindTexture(texture);
 
         glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel());