Fix Any::TypeMismatch unit test

The expected error message relied too much on demangling of std::string.

On Android, it shows as std::__1::basic_string<...>. So just use a
rough regex to match the error message but do not use it verbatim.

Change-Id: I2c6c7810bf028118cf2ebeb7bd04f47d1da835e5
1 file changed