Keep tent mode when there is a screen wakelock

Keep the outer screen 'on' on foldable devices
for longer if there is an active screen wakelock.

Test: atest BookStyleDeviceStatePolicyTest
Bug: 363174979
Flag: com.android.server.policy.feature.flags.force_foldables_tent_mode_with_screen_wakelock
Change-Id: I77fbd207afb366b361a889be09ed551428366f99