Notification Channels come to SystemUI's own notifications.

There are five channels at present:
    ALERTS - low battery etc.
    SCREENSHOTS - progress & result
    SECURITY - notifications hidden due to policy
    STORAGE - disk low
    STATUS - basically everything else

The importance for each channel should match the legacy
priority of the notifications it carries.

Bug: 34250937
Test: runtest systemui
Change-Id: I5915ca453258caea63b0d9bd756893db05e8d600
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index ab27d07..7f4baa5 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -1800,4 +1800,15 @@
     <!-- SysUI Tuner: Switch to control if device gets unlocked [CHAR LIMIT=60] -->
     <string name="lockscreen_unlock">Prompt for password</string>
 
+    <!-- Title for the notification channel containing important alerts like low battery. [CHAR LIMIT=NONE] -->
+    <string name="notification_channel_alerts">Alerts</string>
+    <!-- Title for the notification channel dedicated to screenshot progress. [CHAR LIMIT=NONE] -->
+    <string name="notification_channel_screenshot">Screenshots</string>
+    <!-- Title for the notification channel for urgent security issues. [CHAR LIMIT=NONE] -->
+    <string name="notification_channel_security">Security</string>
+    <!-- Title for the notification channel containing multi-user status information. [CHAR LIMIT=NONE] -->
+    <string name="notification_channel_user_status">User status</string>
+    <!-- Title for the notification channel for problems with storage (i.e. low disk). [CHAR LIMIT=NONE] -->
+    <string name="notification_channel_storage">Storage</string>
+
 </resources>