[Android WebAPK] Delay locking screen orientation for new-style WebAPKs 2/2

This CL hooks up the SplashscreenObserver#onTranslucencyRemoved()
callback (which runs the delayed screen orientation lock requests)

BUG=957835

Change-Id: Ifc23d1cdbe37606c5bed3191b3b4534b586ec684
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1622641
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662513}
1 file changed