Add a keycode to switch audio tracks (2/2)

A key to switch audio tracks is general on media devices like blu-ray.

Bug: 9728155
Change-Id: I13ebbc64321f3cf10370f9a605f3d94ea0d16d6d
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 7a217c3..841f4bc 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -74,6 +74,7 @@
         case AKEYCODE_MUTE:
         case AKEYCODE_BRIGHTNESS_DOWN:
         case AKEYCODE_BRIGHTNESS_UP:
+        case AKEYCODE_MEDIA_AUDIO_TRACK:
             return true;
     }
     
@@ -112,6 +113,7 @@
         case AKEYCODE_SEARCH:
         case AKEYCODE_BRIGHTNESS_DOWN:
         case AKEYCODE_BRIGHTNESS_UP:
+        case AKEYCODE_MEDIA_AUDIO_TRACK:
             return true;
     }