DEPS: Update Android SDK source to android-31 Bug: angleproject:6650 Change-Id: I7fd3a6c23d47966d055dfaa4dfffed95a9f41240 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3259848 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>