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/cpp/rsCppStructs.h b/cpp/rsCppStructs.h
index 9b703a4..ae7291a 100644
--- a/cpp/rsCppStructs.h
+++ b/cpp/rsCppStructs.h
@@ -3278,10 +3278,10 @@
      * @param TransA The type of transpose applied to matrix A.
      * @param TransB The type of transpose applied to matrix B.
      * @param alpha The scalar alpha.
-     * @param A The input allocation contains matrix A, supported elements type: {Element#F64_2
-     * @param B The input allocation contains matrix B, supported elements type: {Element#F64_2
+     * @param A The input allocation contains matrix A, supported elements type: {Element#F64_2}.
+     * @param B The input allocation contains matrix B, supported elements type: {Element#F64_2}.
      * @param beta The scalar beta.
-     * @param C The input allocation contains matrix C, supported elements type: {Element#F64_2
+     * @param C The input allocation contains matrix C, supported elements type: {Element#F64_2}.
      */
     void ZGEMM(RsBlasTranspose TransA, RsBlasTranspose TransB, Double2 alpha, const sp<Allocation>& A,
                       const sp<Allocation>& B, Double2 beta, const sp<Allocation>& C);
@@ -4351,8 +4351,8 @@
 
 };
 
-}
+} // namespace RSC
 
-}
+} // namespace android
 
 #endif