Fix system process crash

verifyKnownUsers() might fail due to database error
in low storage which will crash the system process
and cause boot loop.

Bug: 300568641
Test: 1. put large files under /data/local/tmp
         to cause low storage
      2. device can reboot successfully
Change-Id: If1a3ac06b2c02b273afa47e6b0a90bf08408fb6b
Merged-In: If1a3ac06b2c02b273afa47e6b0a90bf08408fb6b
(cherry picked from commit 9ff12f33)

services/core/java/com/android/server/locksettings/recoverablekeystore/RecoverableKeyStoreManager.java

@@ -195,8 +195,12 @@ public class RecoverableKeyStoreManager {
         mApplicationKeyStorage = applicationKeyStorage;
         mTestCertHelper = testOnlyInsecureCertificateHelper;
         mCleanupManager = cleanupManager;
-        // Clears data for removed users.
-        mCleanupManager.verifyKnownUsers();
+        try {
+            // Clears data for removed users.
+            mCleanupManager.verifyKnownUsers();
+        } catch (Exception e) {
+            Log.e(TAG, "Failed to verify known users", e);
+        }
         try {
             mRecoverableKeyGenerator = RecoverableKeyGenerator.newInstance(mDatabase);
         } catch (NoSuchAlgorithmException e) {