Revert "init: poll in first stage mount if required devices are not found"

Bug: 62864413

This reverts commit ccf0d39316dcf6cfd7c50d131fd681a1f6c8fd74.

Change-Id: I343e304db4c0e7af2402397ef468cc743a3f08a9
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index 4982b77..28c1c07 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -138,7 +138,7 @@
         HandleFirmwareEvent(uevent);
 
         uevent_queue_.emplace_back(std::move(uevent));
-        return ListenerAction::kContinue;
+        return RegenerationAction::kContinue;
     });
 }
 
@@ -266,10 +266,9 @@
         cold_boot.Run();
     }
 
-    uevent_listener.Poll([&device_handler](const Uevent& uevent) {
+    uevent_listener.DoPolling([&device_handler](const Uevent& uevent) {
         HandleFirmwareEvent(uevent);
         device_handler.HandleDeviceEvent(uevent);
-        return ListenerAction::kContinue;
     });
 
     return 0;