Merge "Updates magnification button after an accessibility action is...

Merge "Updates magnification button after an accessibility action is performed" into sc-dev am: 7d8ae59f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13982585

Change-Id: I199a7a295b4fd330adcc41bcdb262388e561c937