tree ecb0a028970aca2cfa255eb7241a9aa0dd214c93
parent b751033f302ec4a693cb283f43cb9006c3cd30d9
author Tony Wickham <twickham@google.com> 1655247069 -0700
committer Tony Wickham <twickham@google.com> 1655320112 +0000

Proper fix for gesture nav flicker using runOnPageScrollsInitialized()

I root caused the two areas causing the flicker:
A. If page scrolls aren't initialized when we get onActivityInit(), the first scroll even after linkRecentsViewScroll() will jump based on min scroll (due to Clear all button). Fix is to defer linking until page scrolls are initialized.
B. If page scrolls aren't initialized when the gesture starts, RecentsView can jump to the min scroll when calling showCurrentTask(), since that calls setCurrentPage(getRunningTaskIndex()) which might be out of bounds. Fix is to defer that setCurrentPage() until page scrolls are initialized.

Test: open a random app that hasn't been opened in a while, touch down
on nav handle and see if RecentsView scrolls partially or fully
offscreen; repeat 20 times to be sure
Fixes: 233112195

Change-Id: I000960775f8735920d97c87942065a430c9dce0c