Removed always shown allow alerts option config

The "allow alerts" option is now always shown
in emergency alert settings regardless developer
options is turned on or not. This config is not
needed anymore.

Test: Manual
Bug: 146216967

Merged-In: I05aea77562176d3c0b12973006e8492b5084f868
Change-Id: I05aea77562176d3c0b12973006e8492b5084f868
(cherry picked from commit e11349d445ab98d01e37bdb8829b7e3a95ef758a)
2 files changed