Default retry respond max age to 14 days.

app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java

@@ -367,7 +367,7 @@ public final class FeatureFlags {
 
   /** How old a message is allowed to be while still resending in response to a retry receipt . */
   public static long retryRespondMaxAge() {
-    return getLong(RETRY_RESPOND_MAX_AGE, TimeUnit.DAYS.toMillis(1));
+    return getLong(RETRY_RESPOND_MAX_AGE, TimeUnit.DAYS.toMillis(14));
   }
 
   /** Whether or not sending using sender key is enabled. */