add ringtone storage as extra file

admin.options

@@ -2,3 +2,6 @@
 
 *AdminMessage.set_canned_message_module_messages max_size:201
 *AdminMessage.get_canned_message_module_messages_response max_size:201
+
+*AdminMessage.set_ringtone_message max_size:231
+*AdminMessage.get_ringtone_response max_size:231

admin.proto

@@ -178,6 +178,16 @@ message AdminMessage {
       */
     DeviceMetadata get_device_metadata_response = 13;
 
+    /*
+     * Get the Ringtone in the response to this message.
+     */
+    bool get_ringtone_request = 14;
+
+    /*
+     * Get the Ringtone in the response to this message.
+     */
+    string get_ringtone_response = 15;
+
     /*
      * Set the owner for this node
      */
@@ -207,6 +217,11 @@ message AdminMessage {
      */
     string set_canned_message_module_messages = 36;
 
+    /*
+     * Set the ringtone for ExternalNotification.
+     */
+    string set_ringtone_message = 37;
+
     /*
      * Begins an edit transaction for config, module config, owner, and channel settings changes
      * This will delay the standard *implicit* save to the file system and subsequent reboot behavior until committed (commit_edit_settings)

rtttl.options

@@ -0,0 +1 @@
+*RTTTLConfig.ringtone max_size:230

rtttl.proto

@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+option java_package = "com.geeksville.mesh";
+option java_outer_classname = "RTTTLConfigProtos";
+option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/go/generated";
+option csharp_namespace = "Meshtastic.Protobufs";
+
+/*
+ * Canned message module configuration.
+ */
+message RTTTLConfig {
+
+  /*
+   * Ringtone for PWM Buzzer in RTTTL Format.
+   */
+  string ringtone = 1;
+}