autotest (bluetooth): fix bug in bluetooth_SDP_ServiceAttributeRequest

assert_attribute_equals() can't be a static method, because it calls
other methods on the class. oops.

(Sorry I missed this. Autotest was running very slowly earlier this
week. Apparently, I uploaded the previous patch before the test
completed.)

BUG=None
TEST=bluetooth_SDP_ServiceAttributeRequest

Change-Id: I64b058af11948ba66ef7c4a5c175171c5cdff6db
Reviewed-on: https://chromium-review.googlesource.com/263963
Tested-by: mukesh agrawal <quiche@chromium.org>
Reviewed-by: Arman Uguray <armansito@chromium.org>
Commit-Queue: mukesh agrawal <quiche@chromium.org>
1 file changed