ANDROID: kernel: Add restricted vendor hook in creds

Add restricted vendor hook for creds, so we get the creds
information to monitor cred lifetime. During the lifetime,
we store the creds information in a standalone protected
memory and keep track of integrity.

These hooks are required for proper execution with the MTK hypervisor.

Bug: 248994334
Change-Id: I57fbb759452302fa1ba1e720c76bfe671eab96b5
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>