[Device support] INFINIX MOBILITY LIMITED Infinix X6816: settings discovery

Thanks for helping add support for your device. Everything below was collected on-device and reviewed by you before sending.

This is candidate discovery to help a maintainer reproduce the mapping, not a guarantee of support.

contribution_schema=2
created_epoch_ms=1788679478595
app_version=0.5.0-beta0 (500000)
manufacturer=INFINIX MOBILITY LIMITED
model=Infinix X6816
android_sdk=30
fingerprint=Infinix/X6816-OP/Infinix-X6816:11/RP1A.200720.011/220822V875:user/release-keys
one_ui_version=none
hyperos_version=none
adapter=none
rom_version=XOS V10.0.0 (OS10.0-R-P196-220426)
feature_name=Power Marathon
modes=max | min
captured_mode_count=2
scanned_namespaces=secure,global,system
changed_rows=20

# changed settings (value per mode, in the order above)
secure/low_power_manual_activation_count = <absent> | 1
secure/low_power_warning_acknowledged = <absent> | 1
secure/wake_gesture_enabled = 1 | 0
global/app_auto_restriction_enabled = 0 | 1
global/gesture_answer_status = 1 | 0
global/low_power = 0 | 1
global/low_power_sticky = <absent> | 1
global/microintelligence_settings_state = -1 | 42262
global/three_finger_mode = 1 | 0
system/haptic_feedback_enabled = 1 | 0
system/os_action_flip_mute = 1 | 0
system/os_action_music_gesture = 1 | 0
system/os_action_smart_answer = 1 | 0
system/os_action_tapping_wake = 1 | 0
system/tran_refresh_mode = 90 | 60
system/tran_settings_long_battery_action_gesture = 0 | 1
system/tran_settings_long_battery_mode = 0 | 1
system/tran_settings_power_boost_is_first = <absent> | 1
system/tran_settings_smart_optimized_time = 1.9096666666666666 | 4.119666666666667
system/vibrate_when_ringing = 1 | 0

# user_reported_effect (self-reported, NOT verification)
max: unsure
min: unsure

# notes
Phone Master

No files, tests, or entry points are named in the issue. Start by locating the existing device-support mappings and compare them with the supplied Infinix X6816 settings; done should mean the maintainer can reproduce and verify the mapping, since both reported effects are marked unsure.