Fix text in notification settings for apps that do not send notifications

Added a new string to show for apps apps that target T, but do not declare the POST_NOTIFICATIONS permission in notification settings.

Bug: 229108007
Test: `croot` `make -j64 RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings.notification.app.NotificationsOffPreferenceControllerTest"` and manual: open Settings-Notifications-App Settings, check the text for apps that does not post notifications with toggle disabled. Text should be: "This app does not send notifications" when system language is English.
Change-Id: I9822b6f983e00c5982522099e339d86fae45aefe

res/values/strings.xml

@@ -9895,6 +9895,9 @@
     <!-- [CHAR LIMIT=NONE] Text appearing when channel group notifications are off -->
     <string name="channel_group_notifications_off_desc">At your request, Android is blocking this group of notifications from appearing on this device</string>
 
+    <!-- [CHAR LIMIT=NONE] Text appearing when app does not send notifications -->
+    <string name="app_notifications_not_send_desc">This app does not send notifications</string>
+
     <!-- [CHAR LIMIT=NONE] App notification settings: channels title -->
     <string name="notification_channels">Categories</string>
 

src/com/android/settings/notification/NotificationBackend.java

@@ -126,6 +126,7 @@ public class NotificationBackend {
             if (app.requestedPermissions == null || Arrays.stream(app.requestedPermissions)
                     .noneMatch(p -> p.equals(android.Manifest.permission.POST_NOTIFICATIONS))) {
                 row.lockedImportance = true;
+                row.permissionStateLocked = true;
             }
         }
     }
@@ -684,6 +685,9 @@ public class NotificationBackend {
         public boolean systemApp;
         public boolean lockedImportance;
         public boolean showBadge;
+        // For apps target T but have not but has not requested the permission
+        // we cannot change the permission state
+        public boolean permissionStateLocked;
         public int bubblePreference = NotificationManager.BUBBLE_PREFERENCE_NONE;
         public int userId;
         public int blockedChannelCount;

src/com/android/settings/notification/app/NotificationsOffPreferenceController.java

@@ -62,6 +62,8 @@ public class NotificationsOffPreferenceController extends NotificationPreference
                 preference.setTitle(R.string.channel_notifications_off_desc);
             } else if (mChannelGroup != null) {
                 preference.setTitle(R.string.channel_group_notifications_off_desc);
+            } else if (mAppRow.permissionStateLocked) {
+                preference.setTitle(R.string.app_notifications_not_send_desc);
             } else {
                 preference.setTitle(R.string.app_notifications_off_desc);
             }

tests/robotests/src/com/android/settings/notification/app/NotificationsOffPreferenceControllerTest.java

@@ -20,6 +20,7 @@ import static android.app.NotificationManager.IMPORTANCE_NONE;
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
@@ -32,6 +33,7 @@ import android.os.UserManager;
 
 import androidx.preference.Preference;
 
+import com.android.settings.R;
 import com.android.settings.notification.NotificationBackend;
 
 import com.google.common.collect.ImmutableList;
@@ -157,4 +159,23 @@ public class NotificationsOffPreferenceControllerTest {
         assertThat(pref.getTitle().toString()).contains("app");
         assertThat(pref.isSelectable()).isFalse();
     }
+
+    @Test
+    public void testUpdateState_whenToggleDisabled() {
+        // Given: the app does not request to post notifications
+        // and it's preference toggle is disabled
+        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
+        appRow.banned = true;
+        appRow.permissionStateLocked = true;
+        mController.onResume(appRow, null, null, null, null, null, null);
+        Preference pref = new Preference(RuntimeEnvironment.application);
+
+        // When: updateState(Preference preference) is called
+        mController.updateState(pref);
+
+        // Then: title of pref should be app_notifications_not_send_desc
+        assertEquals(
+                RuntimeEnvironment.application.getString(R.string.app_notifications_not_send_desc),
+                pref.getTitle().toString());
+    }
 }