Ignore empty as well as base UUIDs.

We ignore empty (all zeroes) UUIDs but we do not yet ignore base UUIDs
which are then reported to Java. Base UUIDs should be ignored by the
stack instead of passing them upwards.

Bug: 242595392
Tag: #refactor
Test: Manually by looking at the SDP results reported to Java

Change-Id: Ic06962161143693be21df25f4c35fef65637ee1e