charger: fix secondary display not turning off after first display was off

turn off both display after first display was turned off

Bug: 242967285
Test: charging animation can show in display correctly
Ignore-AOSP-First: cherry-pick from aosp
Signed-off-by: Jack Wu <wjack@google.com>
Change-Id: Ie5741b49322aaf8a3750b1977fb203e4d0df3539