Merge "Null-check tooltip view to avoid race condition crash." into sc-dev am:...

Merge "Null-check tooltip view to avoid race condition crash." into sc-dev am: 262d5493 am: 56187183 am: b1fda2ff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15128610

Change-Id: Ia7cb723ccd3beaec3fd89013ecf5c8bc4bf8834d