Implemented speech feedback for setting UTC timezone.

Added speaking of negative sign for vp_queueInteger (plus is assumed if not negative).

openrtx/src/core/voicePrompts.c

@@ -412,6 +412,8 @@ void vp_queueInteger(const int value)
         return;
 
     char buf[12] = {0};  // min: -2147483648, max: 2147483647
+    if (value < 0)
+        vp_queuePrompt(PROMPT_MINUS);
     snprintf(buf, 12, "%d", value);
     vp_queueString(buf, 0);
 }

openrtx/src/ui/ui.c

@@ -1831,7 +1831,9 @@ void ui_updateFSM(bool *sync_rtx)
                             else if(msg.keys & KEY_RIGHT || msg.keys & KEY_DOWN ||
                                     msg.keys & KNOB_RIGHT)
                                 state.settings.utc_timezone += 1;
-                                // todo announce timezone change
+                            vp_announceSettingsInt(&currentLanguage->UTCTimeZone,
+                                                   queueFlags,
+                                                   state.settings.utc_timezone);
                             break;
                         default:
                             state.ui_screen = SETTINGS_GPS;