Add setBounds to SkLiteDL for Android

The RootRenderNode in Android is changing bounds dynamically. This is a
temporary fix to accomodate that behaviour. (See also b/31304115)

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2358793002

Review-Url: https://codereview.chromium.org/2358793002