[Payments] Move Android strings to components/payments_strings.grdp

The plan is to use the strings on desktop in a next patch.

BUG=689768
TEST=builds

Review-Url: https://codereview.chromium.org/2686733003
Cr-Commit-Position: refs/heads/master@{#448964}
diff --git a/components/components_strings.grd b/components/components_strings.grd
index 35ebafa..9e112517 100644
--- a/components/components_strings.grd
+++ b/components/components_strings.grd
@@ -202,6 +202,7 @@
       <part file="omnibox_strings.grdp" />
       <part file="pageinfo_strings.grdp" />
       <part file="password_manager_strings.grdp" />
+      <part file="payments_strings.grdp" />
       <part file="pdf_strings.grdp" />
       <part file="physical_web_ui_strings.grdp" />
       <part file="policy_strings.grdp" />