Move BiometricUnlockController logs to LogBuffer

Additionally log whether unlocking was allowed when
BiometricUnlockController determines which unlock MODE
to use.

Also log additional fingerprint errors in
KeyguardUpdateMonitorLog.

Test: adb shell settings put global systemui/buffer/BiometricLog
Bug: 250392997
Change-Id: I3b87325f7fdeb3a0d53a2573cd6aae93907bb81c