Merge "Increase size of the back/ime switcher buttons in gesture nav" into...

Merge "Increase size of the back/ime switcher buttons in gesture nav" into sc-dev am: 68839f4b am: 7f029031 am: 75b13229

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14491497

Change-Id: Id0e37171be592d0c03a2f20dd9b77c648571aa91