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

rsProgramStore.cpp

diff --git a/rsProgramStore.cpp b/rsProgramStore.cpp
index 3ee75cc..79cc149 100644
--- a/rsProgramStore.cpp
+++ b/rsProgramStore.cpp
@@ -17,9 +17,8 @@
 #include "rsContext.h"
 #include "rsProgramStore.h"
 
-using namespace android;
-using namespace android::renderscript;
-
+namespace android {
+namespace renderscript {
 
 ProgramStore::ProgramStore(Context *rsc,
                            bool colorMaskR, bool colorMaskG, bool colorMaskB, bool colorMaskA,
@@ -140,9 +139,6 @@
 }
 
 
-namespace android {
-namespace renderscript {
-
 RsProgramStore rsi_ProgramStoreCreate(Context *rsc,
                                       bool colorMaskR, bool colorMaskG, bool colorMaskB, bool colorMaskA,
                                       bool depthMask, bool ditherEnable,
@@ -159,5 +155,5 @@
     return ps.get();
 }
 
-}
-}
+} // namespace renderscript
+} // namespace android