[Benchmarking] Grab weblayer apks in a single build rule.

This will allow us to switch over the chromium_perf.py recipe to
add :telemetry_weblayer_apks as a compile target so that
we can change what telemetry_weblayer_apks contains without needing
to edit the recipe each time.

Recipe change is here
https://chromium-review.googlesource.com/c/chromium/tools/build/+/1938127

Bug: 1028125
Change-Id: I016b126f3f5bd6d3d42f06738cdad4868da2a3dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1938069
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Reviewed-by: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719448}

tools/perf/chrome_telemetry_build/BUILD.gn

@@ -23,8 +23,7 @@ group("telemetry_chrome_test") {
     data_deps += [
       "//android_webview/test:webview_instrumentation_apk",
       "//chrome/android:chrome_public_apk",
-      "//weblayer/shell/android:weblayer_support_apk",
-      "//weblayer/shell/android:weblayer_shell_apk",
+      ":telemetry_weblayer_apks",
     ]
 
     if (enable_chrome_android_internal) {
@@ -73,6 +72,22 @@ group("telemetry_chrome_test") {
   }
 }
 
+group("telemetry_weblayer_apks") {
+  testonly = true
+
+  data_deps = []
+  if (is_android) {
+    data_deps += [
+      "//weblayer/shell/android:weblayer_support_apk",
+      "//weblayer/shell/android:weblayer_shell_apk",
+
+      # TODO(crbug.com/1022823): Uncomment the following line after
+      # the chromium_perf.py recipe has been set up to use this build rule.
+      #"//weblayer/shell/android:weblayer_shell_system_webview_apk",
+    ]
+  }
+}
+
 group("telemetry_chrome_test_without_chrome") {
   testonly = true