ANDROID: fix kernelci build-break due to stop_ipi hook

Fix build-break for non GKI builds caused by using the
_rcuidle() variant of a vendor hook.

Fixes: bad091cc ("ANDROID: vendor_hooks: Add vendor hooks for
getting printk messages")
Signed-off-by: Todd Kjos <tkjos@google.com>
Change-Id: I0dffaf7e0df198a63578818f7c155671efe382b5