Make permission RECEIVE_EMERGENCY_BROADCAST public.

It is required to receive intent SMS_EMERGENCY_CB_RECEIVED_ACTION
which is already public.

Bug: 24914029
Change-Id: I2d5461fcedb2cb347c818ab6f94577008f6af242
(cherry picked from commit 45d9b36fc6a609893022b812084987cda3e3717d)
3 files changed