Prepare OpenGLRenderer to use glyphs from TextLayoutCache

- add OpenGLRenderer.drawGlyph()
- refactor glypth logging code

Change-Id: I797e6f1304d3f3f8f6ed31e7f9965d336233d2a4
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 80a7bed..34226c4 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1982,6 +1982,11 @@
     drawTextDecorations(text, bytesCount, length, oldX, oldY, paint);
 }
 
+void OpenGLRenderer::drawGlyphs(const char* glyphs, int index, int count, float x, float y,
+        SkPaint* paint) {
+    // TODO
+}
+
 void OpenGLRenderer::drawPath(SkPath* path, SkPaint* paint) {
     if (mSnapshot->isIgnored()) return;