[Chromedriver] Enabling java tests ClickScrollingTest & WindowSwitchingTest on android waterfall bots.
[Chromedriver] Enabling java tests ClickScrollingTest & WindowSwitchingTest on android waterfall bots.

BUG=chromedriver:1006 , chromedriver:1044

Review URL: https://codereview.chromium.org/1562803004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#374716}

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