frameworks/rs: fix typos and clang-tidy warnings

This change fixes a few typos and clang tidy warnings related to the
"llvm-namespace-comment" checks.

Bug: 26936282
Test: WITH_TIDY=1 WITH_TIDY_CHECKS="llvm-namespace-comment" mm
Change-Id: Ic65182e5b4999fbd48d6a8ad7172e4bfeeb541f4
diff --git a/driver/rsdMeshObj.h b/driver/rsdMeshObj.h
index 58eb1ae..79a1050 100644
--- a/driver/rsdMeshObj.h
+++ b/driver/rsdMeshObj.h
@@ -25,8 +25,8 @@
     class Mesh;
     class Element;
 
-}
-}
+} // namespace renderscript
+} // namespace android
 
 #include "driver/rsdVertexArray.h"
 
diff --git a/driver/rsdShader.h b/driver/rsdShader.h
index dc31c24..1b5c010 100644
--- a/driver/rsdShader.h
+++ b/driver/rsdShader.h
@@ -27,8 +27,8 @@
 class Context;
 class Program;
 
-}
-}
+} // namespace renderscript
+} // namespace android
 
 class RsdShaderCache;
 
diff --git a/driver/rsdShaderCache.h b/driver/rsdShaderCache.h
index 884b1c8..94b66c4 100644
--- a/driver/rsdShaderCache.h
+++ b/driver/rsdShaderCache.h
@@ -22,8 +22,8 @@
 
 class Context;
 
-}
-}
+} // namespace renderscript
+} // namespace android
 
 
 #if !defined(RS_SERVER) && !defined(RS_COMPATIBILITY_LIB)
diff --git a/driver/rsdVertexArray.h b/driver/rsdVertexArray.h
index 975121b..34a4663 100644
--- a/driver/rsdVertexArray.h
+++ b/driver/rsdVertexArray.h
@@ -24,8 +24,8 @@
 
 class Context;
 
-}
-}
+} // namespace renderscript
+} // namespace android
 
 // An element is a group of Components that occupies one cell in a structure.
 class RsdVertexArray {