Settings: Add app lock summary for 0 protected apps

Change-Id: I8a600d30a49b99260073ccc6f7fc211e15c92fc8
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
diff --git a/src/com/android/settings/security/applock/AppLockSettingsPreferenceController.kt b/src/com/android/settings/security/applock/AppLockSettingsPreferenceController.kt
index 5339ea3..42b7517 100644
--- a/src/com/android/settings/security/applock/AppLockSettingsPreferenceController.kt
+++ b/src/com/android/settings/security/applock/AppLockSettingsPreferenceController.kt
@@ -108,7 +108,7 @@
 
     private fun getSummaryForListSize(size: Int): CharSequence? =
         if (size == 0) {
-            null
+            mContext.getString(R.string.app_lock_packages_summary)
         } else {
             mContext.resources.getQuantityString(R.plurals.app_lock_summary, size, size)
         }