Bluetooth SDP autotest: tests for existing attributes

This CL adds the support for continuation state in Service Attribute
Requests and a test for it. It also adds some tests for existing
attributes of existing services.

BUG=chromium:329044
TEST=test_that --board ${BOARD} ${HOSTNAME} bluetooth_SDP_ServiceAttributeRequest

Change-Id: Ica7626be9b46ebb238e169ee0efea091761a35d1
Reviewed-on: https://chromium-review.googlesource.com/202788
Tested-by: Artem Rakhov <arakhov@chromium.org>
Reviewed-by: Fang Deng <fdeng@chromium.org>
Reviewed-by: Arman Uguray <armansito@chromium.org>
Commit-Queue: Artem Rakhov <arakhov@chromium.org>
3 files changed