Add support for showing the user's own status over their avatar on the app's Settings button. (#5912)

* Add a common .inverseMask view modifier and use a blend mode for efficiency.

This also fixes the snapshot rendering 🎉

* Add support for the status emoji on the app's Setting button.

* Align the room header decoration icons with the status emoji.

* Add missing snapshots.

AccessibilityTests/Sources/GeneratedAccessibilityTests.swift

@@ -55,6 +55,10 @@ extension AccessibilityTests {
         try await performAccessibilityAudit(named: "AvatarHeaderView_Previews")
     }
 
+    func testAvatarSettingsButtonLabel() async throws {
+        try await performAccessibilityAudit(named: "AvatarSettingsButtonLabel_Previews")
+    }
+
     func testBadgeLabel() async throws {
         try await performAccessibilityAudit(named: "BadgeLabel_Previews")
     }