Add keyboard volume mute LED. (2/2)
(cherry picked from https://partner-android-review.googlesource.com/q/commit:80f60ec95afc0c5995647aa19f87b5389f656c25)

Change-Id: I75f68a34b2557deeb9e5d760480e5ab4aa6af328
Bug: 373556678
Flag: NONE external OEM contribution only active in their devices
diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index 6a248ef..6b45dd3 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -131,8 +131,9 @@
     PLAYER_ID = 1,
     KEYBOARD_BACKLIGHT = 2,
     KEYBOARD_MIC_MUTE = 3,
+    KEYBOARD_VOLUME_MUTE = 4,
 
-    ftl_last = KEYBOARD_MIC_MUTE
+    ftl_last = KEYBOARD_VOLUME_MUTE
 };
 
 enum class InputDeviceLightCapability : uint32_t {