Prevent Infinite Recursion in Telecom Sessions

There looks to be a case where infinite recursion
is occuring when printing information about
Telecom Sessions. Set a reasonable limit of
iterations and throw a warning when this condition
occurs to better track down a root cause.

Bug: 139045282
Test: atest TelecomUnitTests:SessionTest
Merged-In: Iae69c5db070c5e58ae5d37c12d1c4df027138611
Change-Id: Iae69c5db070c5e58ae5d37c12d1c4df027138611