RebootEscrow: add bugreport dump

To make it a little easier to understand the current state
in a bugreport, log some of the internal state when a dump
is requested.

(cherry picked from commit cdd8467a34)

Bug: 151512506
Test: adb shell dumpsys lock_settings
Merged-In: If6889737a5be452833f587db5400dc5fde27cd47
Change-Id: If6889737a5be452833f587db5400dc5fde27cd47

services/core/java/com/android/server/locksettings/LockSettingsService.java

@@ -3193,6 +3193,12 @@ public class LockSettingsService extends ILockSettings.Stub {
         mStrongAuth.dump(pw);
         pw.println();
         pw.decreaseIndent();
+
+        pw.println("RebootEscrow:");
+        pw.increaseIndent();
+        mRebootEscrowManager.dump(pw);
+        pw.println();
+        pw.decreaseIndent();
     }
 
     /**

services/core/java/com/android/server/locksettings/RebootEscrowManager.java

@@ -18,6 +18,7 @@ package com.android.server.locksettings;
 
 import static android.os.UserHandle.USER_SYSTEM;
 
+import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.UserIdInt;
 import android.content.Context;
@@ -35,6 +36,7 @@ import com.android.internal.util.FrameworkStatsLog;
 import com.android.internal.widget.RebootEscrowListener;
 
 import java.io.IOException;
+import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.NoSuchElementException;
@@ -390,4 +392,23 @@ class RebootEscrowManager {
     void setRebootEscrowListener(RebootEscrowListener listener) {
         mRebootEscrowListener = listener;
     }
+
+    void dump(@NonNull PrintWriter pw) {
+        pw.print("mRebootEscrowWanted=");
+        pw.println(mRebootEscrowWanted);
+
+        pw.print("mRebootEscrowReady=");
+        pw.println(mRebootEscrowReady);
+
+        pw.print("mRebootEscrowListener=");
+        pw.println(mRebootEscrowListener);
+
+        boolean keySet;
+        synchronized (mKeyGenerationLock) {
+            keySet = mPendingRebootEscrowKey != null;
+        }
+
+        pw.print("mPendingRebootEscrowKey is ");
+        pw.println(keySet ? "set" : "not set");
+    }
 }