Docs plus removing some junk per API review.

Change-Id: I45f995b656754550be68c78e467071d6e59b348f
diff --git a/graphics/java/android/renderscript/Sampler.java b/graphics/java/android/renderscript/Sampler.java
index 57a9889..c656d75 100644
--- a/graphics/java/android/renderscript/Sampler.java
+++ b/graphics/java/android/renderscript/Sampler.java
@@ -56,7 +56,7 @@
      * Retrieve a sampler with min and mag set to nearest and wrap modes set to
      * clamp.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */
@@ -76,7 +76,7 @@
      * Retrieve a sampler with min and mag set to linear and wrap modes set to
      * clamp.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */
@@ -96,7 +96,7 @@
      * Retrieve a sampler with ag set to linear, min linear mipmap linear, and
      * to and wrap modes set to clamp.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */
@@ -116,7 +116,7 @@
      * Retrieve a sampler with min and mag set to nearest and wrap modes set to
      * wrap.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */
@@ -136,7 +136,7 @@
      * Retrieve a sampler with min and mag set to nearest and wrap modes set to
      * wrap.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */
@@ -156,7 +156,7 @@
      * Retrieve a sampler with ag set to linear, min linear mipmap linear, and
      * to and wrap modes set to wrap.
      *
-     * @param rs
+     * @param rs Context to which the sampler will belong.
      *
      * @return Sampler
      */