[Autofill] Fix regex for UPI VPA

- Adds additional formats of UPI VPA based.
- Allows more symbols in UPI name.
Changes are made based on the specification
(https://www.mpf.org.in/docs/08/NPCI%20Unified%20Payment%20Interface%20UPI%20Specifications,%20October%202015.pdf)

Bug: 977377
Change-Id: I8f805e99e530e463717525e991c8d4f22680398e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1672067
Commit-Queue: Maxim Kolosovskiy <kolos@chromium.org>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Auto-Submit: Maxim Kolosovskiy <kolos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672204}
2 files changed