[displayModeDirector] Ignore UDFPS vote when configured to do so

This change introduces a new value in config.xml to allow ignoring the
udfps vote.

It also makes changes to Udfps controller code to ignore refresh rate,
and set LHBM unconditionally, when configured to do so.

Bug: 250979028
Test: manually check that fix works
Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/display

Change-Id: Id4c5e12b5e55d704f8d456891b12186f27634fee