Add sticker description to Voiceover

Signal/src/ViewControllers/ConversationView/CV/CVComponents/CVComponentSticker.swift

@@ -197,8 +197,18 @@ public class CVComponentSticker: CVComponentBase, CVComponent {
 
 extension CVComponentSticker: CVAccessibilityComponent {
     public var accessibilityDescription: String {
-        // NOTE: We could include the strings used for sticker suggestion.
-        OWSLocalizedString("ACCESSIBILITY_LABEL_STICKER",
-                          comment: "Accessibility label for stickers.")
+        if let approximateEmoji = stickerMetadata?.firstEmoji {
+            return String(
+                format: OWSLocalizedString(
+                    "ACCESSIBILITY_LABEL_STICKER_FORMAT",
+                    comment: "Accessibility label for stickers. Embeds {{ name of top emoji the sticker resembles }}"),
+                approximateEmoji
+            )
+        } else {
+            return OWSLocalizedString(
+                "ACCESSIBILITY_LABEL_STICKER",
+                comment: "Accessibility label for stickers."
+            )
+        }
     }
 }

Signal/translations/en.lproj/Localizable.strings

@@ -25,6 +25,9 @@
 /* Accessibility label for stickers. */
 "ACCESSIBILITY_LABEL_STICKER" = "Sticker";
 
+/* Accessibility label for stickers. Embeds {{ name of top emoji the sticker resembles }} */
+"ACCESSIBILITY_LABEL_STICKER_FORMAT" = "Sticker similar to %@";
+
 /* Accessibility label for a voice memo. */
 "ACCESSIBILITY_LABEL_VOICE_MEMO" = "Voice message";