Merge "Update back arrow panel dimensions." into tm-dev am: 3f32ba87 am:...

Merge "Update back arrow panel dimensions." into tm-dev am: 3f32ba87 am: 15af5768 am: 72827d03

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17574629



Change-Id: I0d9a6ed2ed7d93630e1f84cd5c63fe6d7cf3ade9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>