PaymentRequest: Add payer name field to payer info editor. (android)

This CL is adding a name field to collect payer name from user on Payment UI.

Blink side change:
  https://codereview.chromium.org/2348103002/

Related spec change:
  https://github.com/w3c/browser-payment-api/pull/270

Intent to implement and ship:
  https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/_L5nKV3SSYw

BUG=648051

Review-Url: https://chromiumcodereview.appspot.com/2368073002
Cr-Commit-Position: refs/heads/master@{#426718}
19 files changed