Add keywords to Pointer Scale previously associated with Large Pointer.

This will allow users to find the new Pointer Scale setting, even if
they are searching for the now removed Large Mouse Pointer.

Fix: 366376119
Test: Manual. Search in Settings for "Large" etc.
Flag: android.view.flags.enable_vector_cursor_a11y_settings
Change-Id: Ie6d02664d5c03196a89c76e8d0a493d5f05c107d