HDMICEC: Keep device name empty when OSD name is not set

This is an update to have a consistent behaviour introduced by
ag/9557452.

Bug: 246903679
Test: atest com.android.server.hdmi
Change-Id: If05c8aab24dc83cb342e07a3468aebb4048d0925

services/core/java/com/android/server/hdmi/NewDeviceAction.java

@@ -172,7 +172,7 @@ final class NewDeviceAction extends HdmiCecFeatureAction {
             return;
         }
         if (mDisplayName == null) {
-            mDisplayName = HdmiUtils.getDefaultDeviceName(mDeviceLogicalAddress);
+            mDisplayName = "";
         }
         HdmiDeviceInfo deviceInfo = HdmiDeviceInfo.cecDeviceBuilder()
                 .setLogicalAddress(mDeviceLogicalAddress)