[Android] Add an out-of-app instrumentation driver APK.

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index 864283858076ec045fc122f399a166af2a075690..ae5529137424796a52424141cada47810f719d30 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -457,6 +457,9 @@ android_apk("chrome_shell_test_apk") {
     "//sync/android:sync_javatests",
     "//ui/android:ui_javatests",
   ]
+  datadeps = [
+    "//testing/android/driver:driver_apk",
+  ]
   apk_name = "ChromeShellTest"
   android_manifest = "shell/javatests/AndroidManifest.xml"
 }