Merge "Document that some Telecom broadcast and extra keys are dead-ends." am:...
Merge "Document that some Telecom broadcast and extra keys are dead-ends." am: 175ae029 am: 9b43be90 am: 29daad8c am: c4fd89de am: 01829ef9
Change-Id: Iaa0f10f138a97f690ba6acce93d094213f02284b