Fix google-build-using-namespace warnings in rs.

* Most files define classes in renderscript namespace.
  Define them in the namespace instead of "using namespace ...".
  Some files define global C++ names, and we replace
  "using namespace ..." with using declarations of the required names.
* Add "NOLINT" comment to rsg_generator.c output code to suppress
  such warnings.

Bug: 32670901
Test: build with WITH_TIDY=1
Change-Id: I9b0edcad3e1fb37c79927b05fd58fb1a301bdf22

rsProgramVertex.cpp

diff --git a/rsProgramVertex.cpp b/rsProgramVertex.cpp
index 3492f63..933ff22 100644
--- a/rsProgramVertex.cpp
+++ b/rsProgramVertex.cpp
@@ -18,9 +18,8 @@
 #include "rsProgramVertex.h"
 #include "rsMatrix4x4.h"
 
-using namespace android;
-using namespace android::renderscript;
-
+using android::renderscript::ProgramVertex;
+using android::renderscript::ProgramVertexState;
 
 ProgramVertex::ProgramVertex(Context *rsc, const char * shaderText, size_t shaderLength,
                              const char** textureNames, size_t textureNamesCount, const size_t *textureNamesLength,