Add test for android::base::Split with a trailing empty part.

  ASSERT_EQ("bar", parts[2]);

}

TEST(strings, split_with_trailing_empty_part) {

  std::vector<std::string> parts = android::base::Split("foo,bar,", ",");

  ASSERT_EQ(3U, parts.size());

  ASSERT_EQ("foo", parts[0]);

  ASSERT_EQ("bar", parts[1]);

  ASSERT_EQ("", parts[2]);

}

TEST(strings, split_null_char) {

  std::vector<std::string> parts =

      android::base::Split(std::string("foo\0bar", 7), std::string("\0", 1));