Run test only when flag reset mitigation is disabled

The test is testing the behaviour when the flag reset functionality
is disabled. Add the required annotation.

Bug: 435472071
Flag: com.android.crashrecovery.flags.flag_reset_enabled
Test: http://go/abtd-run/L90400030014709577
Change-Id: I222a95d88a59039b23a54a851ef6eb431e69b27a