chromeos: Modify Bluetooth AVRCP Specific Keycodes

Chrome OS Bluetooth stack generated KEY_PLAYCD for media control versus
keyboards use KEY_PLAY. Modify Bluetooth specific key into existing
keyboard's one.

BUG=b/147366099

Change-Id: I9cb060a1942a71ab16d40095a4e7fe7a542149df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2031999Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: Kevin Schoedel <kpschoedel@chromium.org>
Commit-Queue: Michael Sun <michaelfsun@google.com>
Cr-Commit-Position: refs/heads/master@{#742272}

ui/events/ozone/evdev/keyboard_util_evdev.cc

@@ -26,6 +26,8 @@ int NativeCodeToEvdevCode(int native_code) {
 int EvdevCodeToNativeCode(int evdev_code) {
   if (evdev_code == KEY_RESERVED)
     return KeycodeConverter::InvalidNativeKeycode();
+  if (evdev_code == KEY_PLAYCD)
+    evdev_code = KEY_PLAY;
 
   return evdev_code + kXkbKeycodeOffset;
 }