Mark profile password key as critical.

Currently it is erased when keystore for user 0 is cleared, e.g.
when the user clears data for Settings app.

Bug: 35929605
Bug: 64467610
Test: Manually cleared Settings data.
Test: Manually cleared credentials from Settings.
Change-Id: I7e8753a1bf53f5d68d4738a4eb84faa890f026cc
Merged-In: I7e8753a1bf53f5d68d4738a4eb84faa890f026cc

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

@@ -1235,6 +1235,7 @@ public class LockSettingsService extends ILockSettings.Stub {
                                 .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
                                 .setUserAuthenticationRequired(true)
                                 .setUserAuthenticationValidityDurationSeconds(30)
+                                .setCriticalToDeviceEncryption(true)
                                 .build());
                 // Key imported, obtain a reference to it.
                 SecretKey keyStoreEncryptionKey = (SecretKey) keyStore.getKey(