Rename ic_permissions

mailbox-android/src/main/res/layout/fragment_dont_kill_me2.xml

@@ -21,7 +21,7 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            app:srcCompat="@drawable/ic_permissions"
+            app:srcCompat="@drawable/ic_battery_optimizations"
             tools:ignore="ContentDescription" />
 
         <com.google.android.material.divider.MaterialDivider