Add mic mute keyboard led. (2/2)

Change-Id: I6e18c9d99d562aec112fc8ecb3d4e916285368c6
Test: Built
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index a7e0675..39d2f5b 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -177,6 +177,8 @@
     MAX_BRIGHTNESS = 0x00000080,
     /* The input light has kbd_backlight name */
     KEYBOARD_BACKLIGHT = 0x00000100,
+    /* The input light has mic_mute name */
+    KEYBOARD_MIC_MUTE = 0x00000200,
 };
 
 enum class InputBatteryClass : uint32_t {