Restore timing of hideKeyguardViewAfterRemoteAnimation with the fast unlock flag.

Hiding the keyguard view earlier changes timings that cause test failures on cuttlefish (and could potentially cause the lockscreen to not go away on devices under extreme performance stress).

Local testing shows that this is no longer necessary.

Bug: 298186160
Test: manual
Test: atest SystemUITests
Test: atest android.server.wm.keyguard.KeyguardLockedTests
Flag: com.android.systemui.fast_unlock_transition
Change-Id: Ie62129baf2e95770400df77487e0e0bdf880edbd