Default setup wizard to use PIN

- Added "Screen lock options" button in PIN screen, controlled by
  extra EXTRA_SHOW_OPTIONS_BUTTON, which will create a dialog to ask
  the user to choose another screen lock type.
- Extracted ScreenLockType enum and ChooseLockGenericController that
  can be shared by ChooseLockGeneric and the dialog
  ChooseLockTypeDialogFragment.
- The intent extra EXTRA_SHOW_OPTIONS_BUTTON will be set if
  ChooseLockGeneric screen starts ChooseLockPassword /
  ChooseLockPattern without asking the user. (Although the extra is
  ignored by ChooseLockPattern currently)
- Fix layout alignment for the password entry field to remove the
  extra 4dp padding on the sides.

Test: cd tests/robotests && mma
Bug: 35442933
Bug: 38002299
Change-Id: I877fbe08a0c05bb97175e1cbf0260ea6dbda22e2

res/values/strings.xml

@@ -1088,6 +1088,9 @@
     <!-- Message shown in screen lock picker while setting up the backup/fallback screen lock method for fingerprint. Users can choose to use this method to unlock the screen instead of fingerprint, or when fingerprint is not accepted. [CHAR LIMIT=80] [BACKUP_MESSAGE_ID=2799884038398627882] -->
     <string name="lock_settings_picker_fingerprint_message">Choose your backup screen lock method</string>
 
+    <!-- Label for button in screen lock settings, allowing users to choose other types of screen locks. [CHAR LIMIT=40] -->
+    <string name="setup_lock_settings_options_button_label">Screen lock options</string>
+
     <!--  Main Security lock settings --><skip />
     <!--  Title for PreferenceScreen to launch picker for security method when there is none [CHAR LIMIT=22] -->
     <string name="unlock_set_unlock_launch_picker_title">Screen lock</string>