Remove keyguard candidate.

Test: No-op refactoring, existing tests pass.
Bug: 191438572
Change-Id: I187b5a5654bf7d10e63373fca8c40398838e655c

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -404,7 +404,6 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     private AccessibilityShortcutController mAccessibilityShortcutController;
 
     boolean mSafeMode;
-    private WindowState mKeyguardCandidate = null;
 
     // Whether to allow dock apps with METADATA_DOCK_HOME to temporarily take over the Home key.
     // This is for car dock and this is updated from resource.
@@ -3271,14 +3270,6 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         mNavBarVirtualKeyHapticFeedbackEnabled = enabled;
     }
 
-    /** {@inheritDoc} */
-    @Override
-    public void setKeyguardCandidateLw(WindowState win) {
-        mKeyguardCandidate = win;
-        setKeyguardOccludedLw(isKeyguardOccluded(), true /* force */,
-                false /* keyguardOccludingStarted */);
-    }
-
     /**
      * Updates the occluded state of the Keyguard.
      *

services/core/java/com/android/server/policy/WindowManagerPolicy.java

@@ -721,13 +721,6 @@ public interface WindowManagerPolicy extends WindowManagerPolicyConstants {
             int theme, CompatibilityInfo compatInfo, CharSequence nonLocalizedLabel, int labelRes,
             int icon, int logo, int windowFlags, Configuration overrideConfig, int displayId);
 
-    /**
-     * Set or clear a window which can behave as the keyguard.
-     *
-     * @param win The window which can behave as the keyguard.
-     */
-    void setKeyguardCandidateLw(@Nullable WindowState win);
-
     /**
      * Create and return an animation to re-display a window that was force hidden by Keyguard.
      */

services/core/java/com/android/server/wm/DisplayPolicy.java

@@ -1094,9 +1094,6 @@ public class DisplayPolicy {
         switch (attrs.type) {
             case TYPE_NOTIFICATION_SHADE:
                 mNotificationShade = win;
-                if (mDisplayContent.isDefaultDisplay) {
-                    mService.mPolicy.setKeyguardCandidateLw(win);
-                }
                 break;
             case TYPE_STATUS_BAR:
                 mStatusBar = win;
@@ -1292,9 +1289,6 @@ public class DisplayPolicy {
             mDisplayContent.setInsetProvider(ITYPE_NAVIGATION_BAR, null, null);
         } else if (mNotificationShade == win) {
             mNotificationShade = null;
-            if (mDisplayContent.isDefaultDisplay) {
-                mService.mPolicy.setKeyguardCandidateLw(null);
-            }
         } else if (mClimateBarAlt == win) {
             mClimateBarAlt = null;
             mDisplayContent.setInsetProvider(ITYPE_CLIMATE_BAR, null, null);

services/tests/wmtests/src/com/android/server/wm/TestWindowManagerPolicy.java

@@ -127,10 +127,6 @@ class TestWindowManagerPolicy implements WindowManagerPolicy {
         };
     }
 
-    @Override
-    public void setKeyguardCandidateLw(WindowState win) {
-    }
-
     @Override
     public Animation createHiddenByKeyguardExit(boolean onWallpaper,
             boolean goingToNotificationShade, boolean subtleAnimation) {