Restart app after refreshing remote config via internal settings.

core-util/src/main/java/org/signal/core/util/AppUtil.java

@@ -0,0 +1,24 @@
+package org.signal.core.util;
+
+import android.content.Context;
+import android.content.Intent;
+
+import androidx.annotation.NonNull;
+
+public final class AppUtil {
+
+  private AppUtil() {}
+
+  /**
+   * Restarts the application. Should generally only be used for internal tools.
+   */
+  public static void restart(@NonNull Context context) {
+    String packageName   = context.getPackageName();
+    Intent defaultIntent = context.getPackageManager().getLaunchIntentForPackage(packageName);
+
+    defaultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+    context.startActivity(defaultIntent);
+    Runtime.getRuntime().exit(0);
+  }
+}