Adding feature flag for Android Pay v2 Chrome integration.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 8a58680feeb189d5e9c2faaaed035a963b0b1d63..bbf77ae2aa4ace2f450e64e70cf0b821d38033d7 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -93390,6 +93390,7 @@ value.
   <int value="-152677714" label="AsmJsToWebAssembly:enabled"/>
   <int value="-147283486" label="enable-network-portal-notification"/>
   <int value="-146552997" label="enable-affiliation-based-matching"/>
+  <int value="-144134779" label="AndroidPayIntegrationV2:disabled"/>
   <int value="-138773929" label="PassiveDocumentEventListeners:enabled"/>
   <int value="-122492389" label="enable-browser-task-scheduler"/>
   <int value="-119055644" label="GenericSensor:enabled"/>
@@ -93622,6 +93623,7 @@ value.
       label="disable-hide-inactive-stacked-tab-close-buttons"/>
   <int value="1022992701" label="enable-origin-chip-always"/>
   <int value="1033597574" label="disable-layer-squashing"/>
+  <int value="1036068554" label="enable-android-pay-integration-v2"/>
   <int value="1050048304" label="enable-font-cache-scaling"/>
   <int value="1050321458" label="new-profile-management"/>
   <int value="1054910800" label="enable-timezone-tracking-option"/>
@@ -93834,6 +93836,7 @@ value.
   <int value="1955677113" label="trace-export-events-to-etw"/>
   <int value="1958387645" label="ScanCardsInWebPayments:enabled"/>
   <int value="1961425320" label="force-qtkit"/>
+  <int value="1964816410" label="AndroidPayIntegrationV2:enabled"/>
   <int value="1966730288" label="disable-threaded-compositing"/>
   <int value="1969604362" label="enable-pinch-virtual-viewport"/>
   <int value="1980011075" label="debug-packed-apps"/>