media: Record Histogram for IsTypeSupportedEx

Record the same histogram for IsTypeSupportedEx that is already being
recorded for IsTypeSupported. This is just to maintain parity, and
better see any improvements.

Bug: 257115498
Change-Id: I29867303728ed09650fd3646b63ce772842ff140
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6576903
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Commit-Queue: Vikram Pasupathy <vpasupathy@chromium.org>
Reviewed-by: Evan Liu <evliu@google.com>
Reviewed-by: Sangbaek Park <sangbaekpark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1472152}