GitLab

Changes:
* Moved PaymentAppService,
PaymentAppFactoryDelegate, PaymentAppFactoryInterface into //components.

Note that this CL will break clank in compile time because the GPay
integration depends on the changed classes in this CL. A fix[1] on
clank will be submitted immediately after this CL.

[1] https://chrome-internal-review.googlesource.com/c/clank/internal/apps/+/3358145

Bug: 1098908, 1098911, 1142846

Change-Id: Ie3e05b34e5ceb42d40fbc3d472c203297d5b7ab3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2493144
Commit-Queue: Liquan (Max) Gu <maxlg@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822811}