UPSTREAM: core/gatt: Fix not exporting new services

Ever since cache validation was introduced the services are no longer
cleared on disconnect so checking for queue empty is not valid anymore.

BUG=529387

Change-Id: I6a84c48dc35af2ca3b319251ad45f16b3690166f
Reviewed-on: https://chromium-review.googlesource.com/299889
Commit-Ready: Jakub x Jakub Pawlowski <jpawlowski@chromium.org>
Tested-by: Jakub x Jakub Pawlowski <jpawlowski@chromium.org>
Reviewed-by: Arman Uguray <armansito@chromium.org>
Reviewed-by: Jakub x Jakub Pawlowski <jpawlowski@chromium.org>
1 file changed