ozone: evdev: add drawing tablets to keyboard blocklist

Bug: none
Test: check virtual keyboard still appears with drawing tablets
connected to a device in tablet mode, and that buttons on the drawing
tablet (if any) still work.

Change-Id: I7502a585443bda79c448c46e379703258d62ba81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622759Reviewed-by: Michael Spang <spang@chromium.org>
Commit-Queue: Michael Spang <spang@chromium.org>
Auto-Submit: Harry Cutts <hcutts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842379}

ui/events/ozone/evdev/event_device_info.cc

@@ -50,6 +50,10 @@ constexpr struct {
     {0x1050, 0x0010},  // Yubico.com Yubikey
     {0x1050, 0x0407},  // Yubico.com Yubikey 4 OTP+U2F+CCID
     {0x1bcf, 0x08a0},  // Kensington Pro Fit Full-size
+    {0x256c, 0x006d},  // Huion HS64
+    {0x28bd, 0x0914},  // XP-Pen Star G640
+    {0x28bd, 0x091f},  // XP-Pen Artist 12 Pro
+    {0x28bd, 0x0928},  // XP-Pen Deco mini7W
 };
 
 constexpr struct {