Merge "Catching generic app start exceptions in ProxyActivity" into sc-dev am: a693baa663

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13439497

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib2784fe2d21df7cec44969c3fa5c62669a0a8e00