Use the global default cpp_std.

Bug: http://b/344590580
Change-Id: I523e556f77e33fbaa6711b9ada7c8646202a2749
diff --git a/media/codec2/components/gav1/C2SoftGav1Dec.h b/media/codec2/components/gav1/C2SoftGav1Dec.h
index 0e09fcc..e5d10e0 100644
--- a/media/codec2/components/gav1/C2SoftGav1Dec.h
+++ b/media/codec2/components/gav1/C2SoftGav1Dec.h
@@ -84,7 +84,7 @@
             coeffs(C2Color::MATRIX_UNSPECIFIED),
             fullRange(C2Color::RANGE_UNSPECIFIED) { }
 
-      bool operator==(const VuiColorAspects &o) {
+      bool operator==(const VuiColorAspects &o) const {
           return primaries == o.primaries && transfer == o.transfer && coeffs == o.coeffs
                   && fullRange == o.fullRange;
       }