[cronet] Add an isolate file for cronet_test_instrumentation_apk.

components/cronet/android/BUILD.gn

Index: components/cronet/android/BUILD.gn
diff --git a/components/cronet/android/BUILD.gn b/components/cronet/android/BUILD.gn
index 7e0b86322fb91122c242ff78ca7e3123357131ab..89088101ee5592b1912fac50cd395cd0f6f3197d 100644
--- a/components/cronet/android/BUILD.gn
+++ b/components/cronet/android/BUILD.gn
@@ -629,6 +629,16 @@ instrumentation_test_apk("cronet_test_instrumentation_apk") {
   ]
   additional_apks = [ "//net/android:net_test_support_apk" ]
 
+  data = [
+    "//net/data/ssl/certificates/quic_test.example.com.crt",
+    "//net/data/ssl/certificates/quic_test.example.com.key",
+    "//net/data/ssl/certificates/quic_test.example.com.key.pkcs8",
+    "//net/data/ssl/certificates/quic_test.example.com.key.sct",
+  ]
+
+  # TODO(jbudorick): Remove this once GN uses the generated .isolate files.
+  isolate_file = "cronet_test_instrumentation_apk.isolate"
+
   run_findbugs = true
 }