CEC: Allow no vendor-specific data for <Vendor Command With ID>

Changed not to return <Feature Abort> if the command comes
with any vendor-specific data, which is still valid.

Bug: 18816046

Change-Id: I22204d167c7783a841f7bb560e900b525f9f036b

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

@@ -142,7 +142,7 @@ public final class HdmiCecMessageValidator {
         addValidationInfo(Constants.MESSAGE_VENDOR_COMMAND,
                 maxLengthValidator, DEST_DIRECT | SRC_UNREGISTERED);
         addValidationInfo(Constants.MESSAGE_VENDOR_COMMAND_WITH_ID,
-                maxLengthValidator, DEST_ALL | SRC_UNREGISTERED);
+                new VariableLengthValidator(4, 14), DEST_ALL | SRC_UNREGISTERED);
         addValidationInfo(Constants.MESSAGE_VENDOR_REMOTE_BUTTON_DOWN,
                 maxLengthValidator, DEST_ALL | SRC_UNREGISTERED);