keymint_in_vm: Add retry logic for ICommService connection

The KeyMint HAL service occasionally fails to due to a
NAME_NOT_FOUND error when trying to connect to `ICommService`.

This change mitigates the issue by introducing a retry
mechanism around the get_interface call.

Bug: 432582317
Test: atest oemcrypto_test_system
Change-Id: I1942d4d9bafa313b7a4ce965afe387dc708b77d7