Keyguard: fix possible divergent state

Fixes an issue where the state in SystemUI and AM/WM could
get out of sync: If the keyguardGoingAway transition is
started and then later canceled by SystemUI, it never
tells AM that it canceled it.
This causes SystemUI to show itself in keyguard mode,
meanwhile AM/WM do not hide the underlying app because
the status bar is in the going away transition as far
as it is concerned.

Change-Id: I5966f0655fd694ae599a83dda7a9f6463088632b
Fixes: 76367931
Test: delay keyguard going away callback, unlock phone, during the delay, remove SIM; verify it does not end up in bad state

packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java

@@ -1857,6 +1857,8 @@ public class KeyguardViewMediator extends SystemUI {
         synchronized (KeyguardViewMediator.this) {
 
             if (!mHiding) {
+                // Tell ActivityManager that we canceled the keyguardExitAnimation.
+                setShowingLocked(mShowing, mAodShowing, mSecondaryDisplayShowing, true /* force */);
                 return;
             }
             mHiding = false;

services/core/java/com/android/server/am/KeyguardController.java

@@ -121,6 +121,8 @@ class KeyguardController {
     void setKeyguardShown(boolean keyguardShowing, boolean aodShowing,
             int secondaryDisplayShowing) {
         boolean showingChanged = keyguardShowing != mKeyguardShowing || aodShowing != mAodShowing;
+        // If keyguard is going away, but SystemUI aborted the transition, need to reset state.
+        showingChanged |= mKeyguardGoingAway && keyguardShowing;
         if (!showingChanged && secondaryDisplayShowing == mSecondaryDisplayShowing) {
             return;
         }