Remove flag bonded_device_smp_failure_handling

Flag has been in Nextfood for nine weeks per Gantry and should be safe
to remove.

This is a cherry-pick of the reland version and is required because the 25Q2 branch was cut after the fix was in place but before the flag was removed.

Test: mmm packages/modules/Bluetooth
Flag: EXEMPT removing flag com.android.bluetooth.flags.bonded_device_smp_failure_handling
Bug: 385181815
Change-Id: I2cc107a3de1b84cd45af13209ed45cfcec5a5216
(cherry picked from commit 77cc20f000ef4e69fdc1297f6f99e9b379ab5733)
DISABLE_TOPIC_PROTECTOR