Make MaybeCaptureSafetyNetId() a NO-OP for now.

This change needs to be merged back to M74 too :(
For M75, I'll send a follow-upCL that enables this feature behind a
Finch flag that's disabled by default.

The relevant GmsCore release should be out soon so it should be safe for
M75 release.

R=drubery

Bug: 954255
Change-Id: Iebb0f78aa4fd6e5219ffa3645c98fcf1b5d32244
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574143
Auto-Submit: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652261}

chrome/browser/safe_browsing/telemetry/android/android_telemetry_service.cc

@@ -248,18 +248,9 @@ AndroidTelemetryService::GetReport(download::DownloadItem* item) {
 
 void AndroidTelemetryService::MaybeCaptureSafetyNetId() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  DCHECK(sb_service_->database_manager());
-  if (!safety_net_id_on_ui_thread_.empty() ||
-      !sb_service_->database_manager()->IsSupported()) {
-    return;
-  }
-
-  base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, {content::BrowserThread::IO},
-      base::BindOnce(&SafeBrowsingDatabaseManager::GetSafetyNetId,
-                     sb_service_->database_manager()),
-      base::BindOnce(&AndroidTelemetryService::SetSafetyNetIdOnUIThread,
-                     weak_ptr_factory_.GetWeakPtr()));
+  // NO-OP for now, similar to M73. Will be enabled via a Finch flag
+  // that's disabled by default later.
+  return;
 }
 
 void AndroidTelemetryService::MaybeSendApkDownloadReport(