Disable DelegateGetFontList test on Android through C++.

Instead of disabling it through a file under build/android, better to
disable it directory in C++ source code to avoid sutle issues in the
bots that was caused when renaming the test or the test suite target
name.

BUG=339980
TEST=ui_unittests_apk
R=sky@chromium.org,primiano@chromium.org

Review URL: https://codereview.chromium.org/611513003

Cr-Original-Commit-Position: refs/heads/master@{#297637}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4642d9377d3044c81d0f32298ba0c203976c8cc9

android/pylib/gtest/filter/ui_unittests_disabled

@@ -1 +0,0 @@
-ResourceBundleTest.DelegateGetFontList