Implement new ways to connect splash and megaphone.

core-ui/src/main/java/org/signal/core/ui/Previews.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui
+
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.Composable
+import org.signal.core.ui.theme.SignalTheme
+
+object Previews {
+  @Composable
+  fun Preview(
+    content: @Composable () -> Unit
+  ) {
+    SignalTheme {
+      Surface {
+        content()
+      }
+    }
+  }
+}