Merge "Pass Executor to to PluginInstanceManager.Factory." into sc-v2-dev am: d72a60f953 am: cc81d631b5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15558873

Change-Id: I21f5ec132f552eed8e097fd5307b61863cfdbe1a