[Autofill Assistant] Update payment request string.

Bug: 806868
Change-Id: I17f1e150ed5cf5d14124086717364c7ac7c5d21a
Reviewed-on: https://chromium-review.googlesource.com/c/1349319Reviewed-by: Stephane Zermatten <szermatt@chromium.org>
Commit-Queue: Mathias Carlen <mcarlen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610623}

components/autofill_assistant_strings.grdp

@@ -14,7 +14,7 @@
       Opening <ph name="SITE_NAME">$1<ex>google.com</ex></ph>…
     </message>
     <message name="IDS_AUTOFILL_ASSISTANT_PAYMENT_INFO_CONFIRM" desc="Text on the payment request primary button to confirm payment information [CHAR-LIMIT=32]" formatter_data="android_java">
-      Confirm
+      Continue
     </message>
     <message name="IDS_AUTOFILL_ASSISTANT_TERMS" desc="The text for the terms and service acceptance checkbox. Sentence-cased." formatter_data="android_java">
       I know the terms &amp; conditions, privacy policy and right of withdrawal of <ph name="BEGIN_BOLD">&lt;b&gt;</ph><ph name="ORIGIN">%1$s<ex>google.com</ex></ph><ph name="END_BOLD">&lt;/b&gt;</ph> (leave unchecked to read).