GitLab

This is a reland of 561f6a86

I reverted the original cl since I wanted to wait for thread safety
review of the following two classes:
-PaymentDetailsUpdateService.java
-PaymentDetailsUpdateServiceHelper.java

Original change's description:
> [Web Payments][Android] Delegation support for intent based apps [2/3]
>
> This cl introduces IPaymentDetailsUpdateService.aidl and
> IPaymentDetailsUpdateServiceCallback.aidl interfaces so that the invoked
> native app can call changePaymentMethod, changeShippingOption, and
> changeShippingAddress methods to notify the browser about the user
> choosing a different payment method, shipping address, or shipping
> option.
>
> This cl implements the plumbing for sending the change events to the
> merchant, but the plumbing for sending the updated payment details from
> the merchant to the invoked app will be landed in a follow up cl.
>
> To test the feature enable "Experimental Web Payments API features" from
> chrome:/flags or use the following commandline flag:
> enable-features=AndroidAppPaymentUpdateEvents
>
> Bug: 1026667
> Change-Id: I799c9dfced15fe2fa916b8ca3634b91366cfc32f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2168009
> Commit-Queue: Sahel Sharify <sahel@chromium.org>
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Liquan (Max) Gu <maxlg@chromium.org>
> Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
> Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#773401}

TBR=mthiesse@chromium.org,rsesek@chromium.org

Bug: 1026667
Change-Id: I10bfc1778ef950deab59dffef48a027ce7e234bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2222899Reviewed-by: Sahel Sharify <sahel@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Commit-Queue: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#773850}