Logs how long it took to show the Autofill UI after a field was focused.

Test: adb shell logcat -b events | grep sysui_
Test: adb dumpsys autofill
Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases

Bug: 65376559
Bug: 66508098

Merged-In: Ia17f8b30d6eef0141b020085985b9ebacff7a455
Change-Id: Ia17f8b30d6eef0141b020085985b9ebacff7a455