Add WRITE_SECURE_SETTINGS permission to emergencyinfo

It's needed to control emergency gesture settings

Bug: 180236600
Test: rebuild
Change-Id: I4c7d85cffca3ad05f3e816b81b0a77b857f3cabf
(cherry picked from commit 48ea2a51)

data/etc/com.android.emergency.xml

@@ -21,5 +21,7 @@
         <permission name="android.permission.MANAGE_USERS"/>
         <permission name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
         <permission name="android.permission.START_ACTIVITIES_FROM_BACKGROUND"/>
+        <!-- Required to update emergency gesture settings -->
+        <permission name="android.permission.WRITE_SECURE_SETTINGS"/>
     </privapp-permissions>
 </permissions>