[DO NOT MERGE] Temporarily disable broken VoiceCallSessionStatsTest

Temporarily disable broken tests to allow telephony tests to be enabled
in presubmit.
These tests are only failing on tm-qpr-dev, so add tag to not merge into master.

Test: atest VoiceCallSessionStatsTest
Bug: 256234604
Change-Id: Id3506fb5c12445f366ac4f502f3b388f141a775d