Merge "Moving all widget picker tests to instrumentation tests" into sc-v2-dev am: 494bbb0b6c am: 3f869092d1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15616025

Change-Id: Idc0143a73210071aac2208d12d41c79d5246204e