Replace get_default_test_tmpdir() with create_tempdir().

`absltest.get_default_test_tmpdir()` is widely used in our code base, but it's
got some problems like not respecting the value of `FLAGS.test_tmpdir`. This
change replaces it with `self.create_tempdir()` in `adb_call_parser_test.py`.

Other changes will follow for other test files.

PiperOrigin-RevId: 642506398