Fix crash on AppBarLayout$ScrollingViewBehavior not being found.

We migrated to AndroidX, and there was a proguard rule to keep
the old version. Need proguard rule to keep the new name space's
version.

Bug: 1052855
Binary-Size: Added proguard rule to keep AndroidX's AppBarLayout.
Change-Id: I56f7a40d7b368e3c5e521324352053c918ac327b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062916
Commit-Queue: benjamin joyce <[email protected]>
Reviewed-by: Yaron Friedman <[email protected]>
Reviewed-by: Ganggui Tang <[email protected]>
Reviewed-by: Mia Glaese <[email protected]>
Reviewed-by: Andrew Grieve <[email protected]>
Cr-Commit-Position: refs/heads/master@{#742506}
2 files changed