minui: Add API to support multiple connectors detection

Add API to support multiple connectors detection

Bug: 227468133
Test: check log in recovery mode
Change-Id: I18c5e0f373a29b153aab038bd289eed18847f2af
diff --git a/minui/graphics_fbdev.cpp b/minui/graphics_fbdev.cpp
index 1cb0c0a..4a7d325 100644
--- a/minui/graphics_fbdev.cpp
+++ b/minui/graphics_fbdev.cpp
@@ -47,6 +47,11 @@
   fprintf(stderr, "Unsupported multiple connectors, blank = %d, index = %d\n", blank, index);
 }
 
+bool MinuiBackendFbdev::HasMultipleConnectors() {
+  fprintf(stderr, "Unsupported multiple connectors\n");
+  return false;
+}
+
 void MinuiBackendFbdev::SetDisplayedFramebuffer(size_t n) {
   if (n > 1 || !double_buffered) return;