docs: lots of additions to the resources docs
new drawable resources
add <merge> and <include> to layout resource
update drawable class descriptioons to point to resources guide
add ID resource type

Change-Id: I733eec50bb2671f28c9e6dd7dec14eb6586f5193
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 11e5ad1..f9abe60 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -7890,7 +7890,9 @@
      * without resorting to another data structure.
      *
      * The specified key should be an id declared in the resources of the
-     * application to ensure it is unique. Keys identified as belonging to
+     * application to ensure it is unique (see the <a
+     * href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>).
+     * Keys identified as belonging to
      * the Android framework or not associated with any package will cause
      * an {@link IllegalArgumentException} to be thrown.
      *