Remove all public mention of RS graphics from docs.

Change-Id: Ie43b5fb0353149aa9af433b6f5c5141349388ea0
diff --git a/graphics/java/android/renderscript/ProgramStore.java b/graphics/java/android/renderscript/ProgramStore.java
index d0fd6e5..dac9e76 100644
--- a/graphics/java/android/renderscript/ProgramStore.java
+++ b/graphics/java/android/renderscript/ProgramStore.java
@@ -21,6 +21,7 @@
 
 
 /**
+ * @hide
  * <p>ProgramStore contains a set of parameters that control how
  * the graphics hardware handles writes to the framebuffer.
  * It could be used to:</p>