Add a flag for voip app actions and tag relevant API.

This CL defines a new feature flag in Telecom to be used to signal when support for additional VOIP app actions is active. This CL also tags the PROPERTY_IS_TRANSACTIONAL API with that flag.

Test: manual
Fixes: 297436628
Change-Id: I812ad5286410b7842ab74e9f6cd282ad1227c119
2 files changed