Reland: Fix timing attack in BTM_BleVerifySignature

ag/24018459 was dropped while aosp/2816480
and aosp/2816481 were merged to internal
branches.

This change reland ag/24018459 on udc-dev-plus-aosp

Bug: 309300423
Test: m com.android.btservices
Ignore-AOSP-First: security
Change-Id: I8de6bf6de134f06659658e9aba53b3cdd7048a3c