Remove EXTRA_KEY_TYPE intent data

This intent data was only used by CryptKeeperSettings, which has been
removed.  This is also one of the only remaining users of the
StorageManager.CRYPT_TYPE_* constants which were only ever intended to
be used with vold's Full Disk Encryption APIs, which have been removed.

Bug: 208476087
Test: m RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.password
      (No regressions seen; 2 tests fail both before and after.)
Change-Id: Id6e2c0f5ecc79f7372b29393e66ffbd66d52d7a2

src/com/android/settings/password/ChooseLockSettingsHelper.java

@@ -44,7 +44,6 @@ public final class ChooseLockSettingsHelper {
 
     private static final String TAG = "ChooseLockSettingsHelper";
 
-    public static final String EXTRA_KEY_TYPE = "type";
     public static final String EXTRA_KEY_PASSWORD = "password";
     public static final String EXTRA_KEY_RETURN_CREDENTIALS = "return_credentials";
     // Force the verifyCredential path instead of checkCredential path. This will be removed
@@ -191,7 +190,7 @@ public final class ChooseLockSettingsHelper {
         /**
          * @param returnCredentials if true, puts the following credentials into intent for
          *                          onActivityResult with the following keys:
-         *                          {@link #EXTRA_KEY_TYPE}, {@link #EXTRA_KEY_PASSWORD},
+         *                          {@link #EXTRA_KEY_PASSWORD},
          *                          {@link #EXTRA_KEY_CHALLENGE_TOKEN},
          *                          {@link #EXTRA_KEY_GK_PW_HANDLE}
          *                          Note that if this is true, this can only be called internally.