fix(25335): fix flaky test "Unlock wallet should send first three Pag…

…e metric events upon fullscreen page load" (#25351)

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## **Description**
The flakyness comes from unordered events from time to time. 
Based on the log of events when unlock wallet: 

<img width="903" alt="截屏2024-06-14 22 33 12"
src="https://github.com/MetaMask/metamask-extension/assets/12678455/69396558-d514-4db9-ab44-ae2f921e0546">


The `events` array is not sorted, and there is nothing wrong with
metrics itself and the order of sending, which can be validated by
`timestamp`.

Therefore the fix is to order events by `timestamp` and assert the
value.

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## **Related issues**

Fixes: #25335

## **Manual testing steps**

1. Go to this page...
2.
3.

## **Screenshots/Recordings**

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### **Before**


### **After**

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test/e2e/tests/metrics/unlock-wallet.spec.js

@@ -40,15 +40,26 @@ describe('Unlock wallet', function () {
         await unlockWallet(driver);
         await waitForAccountRendered(driver);
         const events = await getEventPayloads(driver, mockedEndpoint);
-        assert.equal(events.length, 3);
-        assertBatchValue(events[0], 'Home', '/');
-        assertBatchValue(events[1], 'Unlock Page', '/unlock');
-        assertBatchValue(events[2], 'Home', '/');
+        const sortedEvents = sortEventsByTime(events);
+        await assert.equal(sortedEvents.length, 3);
+        assertBatchValue(sortedEvents[0], 'Home', '/');
+        assertBatchValue(sortedEvents[1], 'Unlock Page', '/unlock');
+        assertBatchValue(sortedEvents[2], 'Home', '/');
       },
     );
   });
 });
 
+function sortEventsByTime(events) {
+  events.sort((event1, event2) => {
+    const timestamp1 = new Date(event1.timestamp);
+    const timestamp2 = new Date(event2.timestamp);
+    // Compare timestamps, return -1 for earlier, 1 for later, 0 for equal
+    return timestamp1 - timestamp2;
+  });
+  return events;
+}
+
 function assertBatchValue(event, assertedTitle, assertedPath) {
   const { title, path } = event.context.page;
   assert.equal(title, assertedTitle);