Run module code only after KeyMints receive module info

In order to prevent updateable APEX modules from interfering in module
measurement, have `perform_apex_config` wait for the new system
property `keystore.module_hash.sent` to be set to true before running.
Keystore sets `keystore.module_hash.sent` to true after receiving a
non-error response to `setAdditionalAttestationInfo` from all V4+
KeyMints.

Since Keystore waits for `apexd.status` to be set to
`activated` (before calling `setAdditionalAttestationInfo`),
`perform_apex_config` no longer needs to (once flagging is removed).

With ag/32459798, if sending module info fails, Keystore will crash
(five times), and the device will reboot to bootloader. Preventing boot
from continuing is an intended consequence - an error here likely
indicates a more general issue with Keystore or KeyMint (and one that
likely isn't specific to an individual device).

Bug: 400439023
Test: See executed testing plan at go/32464289-test-plan
Change-Id: I916f64c8bccec45463a5d51bebdcdd60f9eb5977