Fix Protected Broadcast Name for DEBUG_EVENT

The name of the telephony debug broadcast was
changed in code review, but I didn't end-to-end
test it before merge, so it's no longer protected
and throws as WTF.

Bug: 127361354
Test: manual (sent event from PhoneGlobals)
Change-Id: Id4008965f2e696d6c761201c2115f7b1237b0db3
1 file changed