Quick fix for FAB fade setting summary

Fixes the fade setting to properly set its summary when not disabled.

Flag: EXEMPT internal change
Bug: 349178637
Test: Check the settings page with navigation button mode and FAB button mode. Verify the summary of the fade setting is correct in both cases.
Change-Id: Ia87a634fd69e6098f1a0a658f788e69d10f2dbec
1 file changed