Fix up Telecom CTS for presubmit

Fix up the Telecom tests a bit to remove failures due to carried-over
state and add some better logging.

Bug: 158798240
Fixes: 160667708
Test: atest CtsTelecomTestCases
Change-Id: I59452a39210178e1889fac61efb5f113bb6746b5
4 files changed