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/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 {