wdt_util: Add policy file for arm64 platform

Add arm64 policy file of wdt_util for Corsola.

BUG=b:323198453
TEST=Use the command
minijail0 -S wdt_util.query.policy -L wdt_util -v -c -i
minijail0 -S wdt_util.update.policy -L wdt_util -u fw.bin
on arm64 platform

Change-Id: I790a8a71bc2fbc4fcf5308857c2dca24c9e03c58
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/5260319
Commit-Queue: Randy Lai <randy.lai@weida.corp-partner.google.com>
Tested-by: Randy Lai <randy.lai@weida.corp-partner.google.com>
Reviewed-by: Henry Barnor <hbarnor@chromium.org>
Auto-Submit: Randy Lai <randy.lai@weida.corp-partner.google.com>
2 files changed