Use cached keyguard flags during relaunch.

It is possible for the display to be unfrozen before an
AppWindowToken is finished relaunching. This allows for other window
containers (such as the StatusBar) to influence the rotation when
unfreezing.

This changelist prevents the cached keyguard flag values for the
AppWindowToken when relaunching. This prevents incorrect values from
being reported during transient relaunch window states.

Fixes: 38262879
Test: bit FrameworksServicesTests:com.android.server.wm.AppWindowTokenTests#testKeyguardFlagsDuringRelaunch

Change-Id: I2aa23ac282cf7626bb187c6cd1a4a3524f788877