Refactor OneHanded mode UiEventLogger implementation

1) Move UiEventLogger from static to non-static
2) Rename to OneHandedUiEventLogger to align wm-shell components
3) Remove unused code from OneHandedUiEventLogger
4) Refine the call of stopOneHandedWithUiEvent()
5) Only register TaskStackListenerCallback when enabled
6) Override getId() in the enum to ensure UiEventLoggerImpl
   can obtain the event corresponding id accordingly

Fixes: 176513465
Test: adb shell cmd stats print-logs
Test: manual + statsd_testdrive -terse 90
Test: atest WMShellUnitTests
Change-Id: Ic2fb1a2bbf87e647b0883d50b64ced53aa37d613